猫眼草化学成分研究(3)
化合物3 白色粉末;ESI-MS m/z 295[M+H]+;1H-NMR(CDCl3,600 MHz)δ:5.41(1H,t,J=6.9 Hz,H-14),4.15(2H,d,J=6.9 Hz,H-15),2.00(2H,t,J=7.3 Hz,H-12),1.67(3H,br s,H-20),0.87(3H,s,H-16),0.86(3H,s,H-17),0.85(3H,d,J=6.2 Hz,H-18),0.84(3H,d,J=6.6 Hz,H-19);13C-NMR(CDCl3,150 MHz)δ:140.4(C-13),123.0(C-14),59.5(C-15),39.9(C-12),39.4(C-2),37.5(C-10),37.4(C-4),37.4(C-8),36.7(C-1),32.8(C-6),32.7(C-9) ......
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