苗药大乌泡茎乙醇提取物的化学成分研究(3)
化合物3:浅黄色粉末,分子式为C29H48O2,mp:202~204 ℃。ESI-MS:m/z 429[M+H]+。1H-NMR(CDCl3,400 MHz)δ:5.68(1H,s,H-6),3.67(1H,m,H-3),1.19(3H,s,H-19),0.91(3H,d,J=6.0 Hz,H-21),0.82(3H,t,J=7.6 Hz,H-29),0.80(3H,d,J=7.6 Hz,H-27),0.79(3H,d,J=7.6 Hz,H-26),0.67(3H,s,H-18)。13C-NMR(CDCl3,100 MHz)δ:202.45(C-7),165.19(C-5),126.29(C-6),70.70(C-3),54.87(C-17),50.13(C-14),50.10(C-9),45.99(C-24) ......
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