正文 香茅中一個新羊毛脂烷類三萜化合物(2 / 3)

化合物2 白色結晶(氯仿);ESI-MS m/z 429[M+H]+;1 H-NMR(CDCl3,500 MHz)δ:5.22(1H,d,J=6.0 Hz,H-11),3.20(1H,d,J=11.4,4.2 Hz,H-3),1.31(6H,s,26,27-Me),1.60(3H,s,27-Me),1.05(3H,s,19-Me),0.97(3H,s,29-Me),0.90(3H,d,J=7.5 Hz,H-21),0.80(3H,s,28-Me),0.74(3H,s,30-Me),0.65(3H,s,18-Me)。以上數據與文獻[8]對照一致,鑒定化合物為3β-羥基羊毛甾-9(11)-烯。

化合物3 白色結晶(氯仿);HR-ESI-MS m/z 479.386 6[M+Na]+;1 H-NMR(CDCl3,500 MHz)δ:5.22(1H,d,J=6.5 Hz,H-11),4.92,4.84(2H,s,H-26),4.02(1H,t,J=6.3 Hz,H-24),3.37(3H,s,3-OMe),2.65(1H,dd,J=11.5,4.0 Hz,H-3),1.72(3H,s,27-Me),1.04(3H,s,19-Me),0.97(3H,s,29-Me),0.90(3H,d,J=7.5 Hz,20-Me),0.80(3H,s,28-Me),0.73(3H,s,30-Me),0.64(3H,s,18-Me);13 C-NMR(CDCl3 ,125 MHz)δ:148.7(C-9),147.4(C-25),114.7(C-11),111.4(C-26),88.6(C-3),76.8(C-24),57.5(3-OMe),53.0(C-5),50.8(C-17),47.0(C-14),44.3(C-13),41.8(C-8),39.4(C-10),39.0(C-4),37.1(C-12),36.0(C-1),36.0(C-20),33.9(C-15),31.9(C-22),31.5(C-23),28.2(C-29),28.1(C-16),27.9(C-7),22.5(C-2),22.2(C-19),21.2(C-6),18.5(C-21),18.4(C-30),17.2(C-27),16.4(C-28),14.4(C-18)。以上數據與文獻[9]對照一致,鑒定化合物為(24S)-3β-甲氧基羊毛甾-9(11),25-二烯-24-醇。

化合物4 黃色油狀;ESI-MS m/z 173[M+H]+;1 H-NMR(CDCl3 ,500 MHz)δ:4.40(1H,s,H-3),1.22,1.26(6H,s,Me-9,10),0.87(3H,d,J=6.0 Hz,7-Me);13 C-NMR(CDCl3,125 MHz)δ:73.3(C-8),68.1(C-3),48.3(C-4),42.5(C-2),34.8(C-6),28.9(C-9),28.9(C-10),25. 6(C-1),22.2(C-7),20.2(C-5)。以上數據與文獻[10]對照一致,鑒定化合物為8-羥基-新薄荷醇。

化合物5 無色油狀;ESI-MS m/z 171[M+H]+;1 H-NMR(CDCl3 ,300 MHz)δ:5.45(1H,tq,J=6.9,1.2 Hz,H-2),4.95(1H,m,H-8b),4.85(1H,dd,J=1.5,1.2 Hz,H-8a),4.16(2H,d,J=6.9 Hz,H-1),4.06(1H,t,J=6.3 Hz,H-6),2.08(2H,m,H-4),1.73(3H,s,7-Me),1.70(3H,s,3-Me),1.60(2H,s,H-5);13 C-NMR(CDCl3 ,125 MHz)δ:147.3(C-7),139.4(C-3),123.6(C-2),111.2(C-8),75.5(C-6)59.3(C-1),35.5(C-4),32.8(C-5),17.6(7-Me),16.3(3-Me)。以上數據與文獻[11]對照一致,鑒定化合物為(2E)-3,7-二甲基-2,7-辛二烯-1,6-二醇。

化合物6 無色油狀;ESI-MS m/z 157[M+H]+;1 H-NMR(CDCl3 ,500 MHz)δ:5.11(1H,t,J=7.0 Hz,H-6),3.68(2H,t,J=7.0 Hz,H-1),1.98(2H,m,H-5),1.68(6H,s,7,10-Me),1.60(1H,m,H-3),0.90(3H,d,J=7.0 Hz,9-Me);13 C-NMR(CDCl3,125 MHz)δ:131.5(C-7),124.9(C-6),61.4(C-1),40.1(C-2),37.4(C-4),29.4(C-3),25.9(C-8),25.7(C-5),19.7(C-9),17.9(C-10)。以上數據與文獻[12]對照一致,鑒定化合物為(+)-香茅醇。

化合物7 白色結晶(氯仿);ESI-MS m/z 173[M+H]+;1H-NMR(CDCl3 ,500 MHz)δ:3.72(1H,dt,J=4.0,10.5 Hz,H-1α),1.94(1H,α),1.70(1H,m,H-5α),1.68(1H,m,H-3α),1.64(1H,m,H-4β),1.38(1H,m,H-2β),1.22(6H,s,8,9-Me),1.08(1H,m,H-6β),1.02(1H,m,H-4α),0.95(1H,m,H-3β),0.92(3H,d,J=6.5 Hz,10-Me );13C-NMR(CDCl3,125 MHz)δ:74.8(C-7),72.6(C-1),53.2(C-2),44.4(C-6),34.3(C-4),31.1(C-5),29.9(C-9),26.8(C-3),23.4(C-8),21.7(C-10)。以上數據與文獻[13]對照一致,鑒定化合物為7-羥基薄荷醇。