橡胶灵芝化学成分研究(4)
化合物11 淡黄色针晶(氯仿)。ESI-MS m/z 415[M+Na]+。1H-NMR(CDCl3,500 MHz)δ:6.03(1H,d,J=9.4 Hz,H-6),5.73(1H,s,H-4),5.26(1H,dd,J=8.0,15.2 Hz,H-23),5.20(1H,dd,J=8.0,15.2 Hz,H-22),1.05(3H,d,J=6.6 Hz,H-21),0.99(3H,s,H-19),0.95(3H,s,H-18),0.93(3H,d,J=6.8 Hz,H-28),0.84(3H,d,J=7.1 Hz,H-27),0.82(3H,d,J=8.1 Hz,H-26);13C-NMR(CDCl3,125 MHz)δ:34.3(t,C-1),34.4(t,C-2),199.7(s,C-3),123.1(d,C-4),164.6(s,C-5),124.6(d ......
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