云南兔儿风中的三萜类成分(3)
化合物5 白色粉末,EI-MS m/z 426(M+·)。1H-NMR(CDCl3,500 MHz) δ:3.22(1H,dd,J=11.0,5.0 Hz,H-3),5.13(1H,t,J=3.5 Hz,H-12),0.94(3H,s,H-23),0.79(3H,s,H-24),0.97(3H,s,H-25),1.00(3H,s,H-26),1.13(3H,s,H-27),0.83(3H,s,H-28),0.87(6H,s,H-29,30);13C-NMR(CDCl3,125 MHz) δ:38.8(C-1),27.4(C-2),79.2(C-3),38.9(C-4) ......
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