char = C;code = 67
char = h;code = 104
char = a;code = 97
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = a;code = 97
char = n;code = 110
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = o;code = 111
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = h;code = 104
char = y;code = 121
char = /;code = 47
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = y;code = 121
char = .;code = 46
result sql = Characterization of prenylated xanthones and flavanones by liquid chromatography/atmospheric pressure chemical ionization mass spectrometry.
Characterization of prenylated xanthones and flavanones by liquid chromatography/atmospheric pressure chemical ionization mass spectrometry.
char = R;code = 82
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = -;code = 45
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = o;code = 111
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = h;code = 104
char = y;code = 121
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = (;code = 40
char = L;code = 76
char = C;code = 67
char = /;code = 47
char = A;code = 65
char = P;code = 80
char = C;code = 67
char = I;code = 73
char = -;code = 45
char = M;code = 77
char = S;code = 83
char = );code = 41
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = -;code = 45
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = z;code = 122
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = r;code = 114
char = u;code = 117
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = o;code = 111
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = r;code = 114
char = k;code = 107
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = M;code = 77
char = a;code = 97
char = c;code = 99
char = l;code = 108
char = u;code = 117
char = r;code = 114
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = a;code = 97
char = n;code = 110
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = ;code = 32
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = a;code = 97
char = n;code = 110
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = i;code = 105
char = r;code = 114
char = ;code = 32
char = u;code = 117
char = n;code = 110
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = .;code = 46
char = ;code = 32
char = U;code = 85
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = a;code = 97
char = k;code = 107
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = r;code = 114
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = [;code = 91
char = M;code = 77
char = H;code = 72
char = ];code = 93
char = (;code = 40
char = +;code = 43
char = );code = 41
char = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = a;code = 97
char = g;code = 103
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = );code = 41
char = H;code = 72
char = ;code = 32
char = N;code = 78
char = M;code = 77
char = R;code = 82
char = ;code = 32
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = a;code = 97
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = f;code = 102
char = i;code = 105
char = r;code = 114
char = m;code = 109
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = a;code = 97
char = g;code = 103
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = n;code = 110
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = F;code = 70
char = r;code = 114
char = a;code = 97
char = g;code = 103
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = a;code = 97
char = d;code = 100
char = r;code = 114
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char = d;code = 100
char = e;code = 101
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char = ;code = 32
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char = e;code = 101
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char = c;code = 99
char = t;code = 116
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char = ;code = 32
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char = l;code = 108
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char = d;code = 100
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char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = c;code = 99
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char = d;code = 100
char = e;code = 101
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char = i;code = 105
char = t;code = 116
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char = a;code = 97
char = t;code = 116
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char = c;code = 99
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char = i;code = 105
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char = i;code = 105
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char = ;code = 32
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char = m;code = 109
char = i;code = 105
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char = p;code = 112
char = o;code = 111
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char = s;code = 115
char = ;code = 32
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char = n;code = 110
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
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char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = o;code = 111
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char = e;code = 101
char = r;code = 114
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
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char = g;code = 103
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char = t;code = 116
char = e;code = 101
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char = ;code = 32
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char = ;code = 32
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = e;code = 101
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result sql = Reversed-phase liquid chromatography with atmospheric pressure chemical ionization mass spectrometry (LC/APCI-MS) in the positive-ion mode was utilized to analyze crude ether extracts from the root bark of Maclura pomifera, a tree known to have a high content of prenylated xanthones and flavanones. Identification of three xanthones and two flavanones was based on their unique mass spectra. Under optimum conditions peaks corresponding to the [MH](+) ion and characteristic fragments for each compound were observed. (1)H NMR data were used to confirm the identities of two xanthones that had the same molecular mass and similar fragmentation patterns. Fragmentation of the analytes was achieved by application of an electrostatic potential at the entrance of the single quadrupole mass spectrometer. The optimum voltage for fragmentation was found to be related to the class of compounds analyzed and, within each class, to be dependent on the structure of the prenyl moiety. Collision-induced pathways consistent with precedent literature describing the MS characterization of similar compounds and with the observed fragmentation patterns are tentatively proposed.

Publication: J Mass Spectrom 2000 Apr ;35(4)::540-9.
Publication Date: 2000 Apr
Study Author(s): da Costa, C T;Dalluge, J J;Welch, M J;Coxon, B;Margolis, S A;Horton, D;
Institution: American University, Department of Chemistry, 4400 Massachusetts Avenue, Washington, DC 20016, USA.
Shortcut link to this study:
Reversed-phase liquid chromatography with atmospheric pressure chemical ionization mass spectrometry (LC/APCI-MS) in the positive-ion mode was utilized to analyze crude ether extracts from the root bark of Maclura pomifera, a tree known to have a high content of prenylated xanthones and flavanones. Identification of three xanthones and two flavanones was based on their unique mass spectra. Under optimum conditions peaks corresponding to the [MH](+) ion and characteristic fragments for each compound were observed. (1)H NMR data were used to confirm the identities of two xanthones that had the same molecular mass and similar fragmentation patterns. Fragmentation of the analytes was achieved by application of an electrostatic potential at the entrance of the single quadrupole mass spectrometer. The optimum voltage for fragmentation was found to be related to the class of compounds analyzed and, within each class, to be dependent on the structure of the prenyl moiety. Collision-induced pathways consistent with precedent literature describing the MS characterization of similar compounds and with the observed fragmentation patterns are tentatively proposed.
PMID: 10797650

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