... [M -3 1 ]+(90), 30 9 [M- 43] + (35 ), 291 [M -3 1- 30 ]+(16), 278 [M-74]+, 108 [M -3 1-2 14]+(100). Pic m/z 32 3 [M-C2H5]+(14), 292 [M-C2H5 - OCH 3 ]+(14), 239 [M-8 2 -3 1]+, 176 [M-176]+tạo thnh ... 119,54 1 23, 18 11 127,89 127,91 125,78 127,88 12 109,08 107,05 107,21 106 ,39 13 140, 63 139 ,41 138 ,84 137 ,85 14 22,67 23, 00 25,24 25,48 15 35 ,58 35 ,81 34 , 43 39,55 16 37 ,98 38 ,06 38 ,11 42,29 ... 132 6,5; 1116,4; 912,4; 747 ,3. Phổ khối EI-MS (70 eV) m/z (%): 35 4 [M]+(100), 33 9 [M-15]+(8), 32 3 [M -3 1 ]+(100), 30 8 (6), 178 (12), 122 (80). Phổ 1H v1 3 C-NMR: Bảng 1 v 2. Gelsenixin...