Ngày tải lên :
02/11/2012, 11:32
... C-NMR/DEPT (12 5 MHz, CDCl3, ppm): 11 ,9 (q, C -18 ), 12 ,0 (q, C-29), 18 ,7 (q, C- 21) , 19 ,1 (q, C-26), 19 ,5 (q, C-27), 19 ,8 (q, C -19 ), 20,9 (t, C -11 ), 23 ,1 (t, C-28), 24,2 (t, C -15 ), 26 ,1 (t, C-23), ... n-hexan-axeton 19 :1, 9 :1, 6 :1, 3 :1 v 1: 1 Phõn tỏch h thng ó phõn b cỏc nhúm hp cht AP1 theo phõn cc, t AP1 .1 n AP1.8 (n-hexan-axeton 19 :1, hiu sut phõn lp 37,8 %), t AP1.9 n AP1 .12 (n-hexan-axeton 9 :1, ... chanh vi thuc th vanillin/H2SO4 c 1% EI-MS: m/z (%) 270 (M+., C16H14O4, 63,9), 269 (54,7), 19 3 (10 0), 16 7 (34,4), 15 2 (46,8), 13 8 (15 ,1) , 12 4 (12 ,8), 10 3 ( 31, 1), 77 (45,4), 69 (37,8) H-NMR (DMSO-d6):...