Ngày tải lên :
31/03/2015, 16:06
... axetat 4: 1, v/v) IR (film): νmax cm˗1 3323, 2 940 , 145 8, 1375, 1158, 10 36 EI-MS: m/z 44 4 (%) (M+·, C30H52O2, 0 ,6) , 42 6 (1,8), 207 (49 ,4) , 189 ( 84, 1), 149 (61 ,6) , 59 (100) HR-ESI-MS: m/z 46 7,3 862 (tính ... (t, C-2), 45 ,4 (s, C-13), 47 ,9 (d, C-8), 48 ,4 (d, C-5), 48 ,8 (s, C- 14) , 50,2 (s, C -4) , 52,2 (d, C-17), 1 26, 6 (s, C-25), 145 ,6 (d, C- 24) , 173,0 (s, C- 26) , 2 16, 6 (s, C-3) ♦ A13 (Axit 24( E)-3-oxodammara-20(21), 24( 25)-dien-27-oic) ... 30,9 (q, C-30), 32 ,6 (t, C-7), 34, 2 (t, C-2), 34, 4 (t, C-15), 36, 9 (s, C-10), 39 ,6 (t, C-1), 41 ,3 (t, C-19), 41 ,7 (s, C-8), 41 ,9 (s, C- 14) , 44 ,1 (s, C-18), 47 ,4 (s, C -4) , 49 ,7 (d, C-9), 50,1...