合欢花乙酸乙酯部位化学成分研究(3)
化合物4 无色针晶(甲醇),mp 150~153 ℃;HR-ESI-MS m/z 277.189 5[M+K]+(计算值 277.156 4);1H-NMR(CD3OD,400 MHz) δ:3.73(1H,dd,J = 10.1,5.8 Hz,H-2),3.32(1H,br s,H-9),1.03(3H,s,H-14),0.93(3H,s,H-15),0.87(3H,s,H-13);13C-NMR(CD3OD,100 MHz) δ:45.4(s,C-1),81.4(d,C-2),48.2(t,C-3),37.7(s,C-4),52.0(d,C-5),21.7(t,C-6),36.7(t,C-7),35.8(s,C-8),75.9(d,C-9),27.8(t,C-10),26.9(t,C-11),34.5(t ......
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