荷叶化学成分研究(4)
化合物24白色针状晶体(甲醇),mp 157~159 ℃。EI-MS m/z 414,399,396,381,329,303,273,271,255,246,231,213。1H-NMR(CDCl3,600 MHz)δ: 5.32(1H,m,H-7),3.54(1H,m,H-3),0.92(3H,d,J=6.6 Hz,H-21),0.85(3H,t,J=7.4 Hz,H-29),0.83(3H,d,J=7.5 Hz,H-26),0.81(3H,d,J=7.5 Hz,H-27),0.80(1H,s,H-19),0.53(1H,s,H-18);13C-NMR(CDCl3,150 MHz)δ: 37.2(C-1),31.3(C-2),73.7(C-3),40.5(C-4) ......
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