第一个文件,样品MBC?ET?1的图谱应该是lupane型三萜,没有OH,有一个酮基。样品纯度很好呢!
初步印象与lupenone结构
相似。
可参考下面文献:
Lupenone
Colorless needles (3.6 mg), mp 168- 170ºC. IR ν max cm -1 3434, 1715,1459, 918; EIMS for C30H48O
m/z (rel. int.): 424 [M+]; 1H NMR (CDCl3, 400 MHz): δ 0.73, o.87, 0.96, 1.01, 1.05, 1.70 (each 3H, s,
Me × 7), 4.69 (1H, s, H-29b), 4.57 (1H, s, H-29a); 13C NMR (CDCl3, 100 MHz): δ 214.0 (C- 3), 151.1
(C-20), 109.6 (C-29), 59.7 (C-5), 58.4 (C-9), 53.3 (C-18), 43.0 (C-19), 42.4 (C-17), 41.8 (C-4), 41.4
(C-14, 8), 40.2 (C-22), 39.5 (C-1), 36.2 (C-10, 16), 35.2 (C-13), 35.0 (C-2), 33.1(C-7), 32.3 (C-23),
32.0 (C-24), 30.2 (C-15), 30.0 (C-21), 29.6 (C-12), 22.5 (C-11), 21.2 (C-30), 20.5 (C-28), 18.9(C-25),
18.5 (C-6), 18.2 (C-26), 14.9 (C-27).
http://www.eurojournals.com/ejsr_28_1_08.pdfhttp://www.jipb.net/pubsoft/content/2/2226/X010143(PS2).pdf