蓖麻中的萜类和甾体及抗糖尿病活性研究(3)
26),0.93(3H,s,H-23),0.92(3H,s,H-27),0.91(3H,s,H-25),0.86(3H,s,H-28),0.85(3H,s,H-24);13C-NMR(CDCl3,100 MHz) 数据见表1。以上数据与文献[14]报道acetylaleuritolic acid的数据一致。化合物8 白色粉末;ESI-MS m/z 413 [M+H]+;1H-NMR(CDCl3,400 MHz) δ:5.72(1H,s,H-4),1.17(3H,s,H-19),0.92(3H,d,J=6.2 Hz,H-21),0.86(3H,t,J=6.3 Hz,H-29),0.82(3H,d,J=6.4 Hz,H-27),0.78(3H ......
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