西洋参果的一个新三萜皂苷
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从加拿大产西洋参Panax quinquefolium L.果实中分离得到了个新的三萜皂苷,通过理化性质分析和波谱解析(MS、1D-NMR、2D-NMR),确定其结构为20(S)-3-[O-β-D-吡喃葡萄糖基-(1-2)-β-D-K比喃葡萄糖基]-达玛-22Z,24-二烯-3,12,20-三醇,命名为西洋参皂苷-F1(1)(quinquenoside F1),西洋参皂苷-F1(1)为白色无定型粉未,mp:195~197℃(MeOH).Liebermann-Burchard反应、Molish反应阳性,10%硫酸水解检出葡萄糖.FAB-MS(m/z):806[M+Na+H]+.1H-NMR(300MHz,C5D5N):δ 7.60(1H,dd,J=14.0,7.0 Hz,23-H),6.30(1H,d,J=7.0 Hz,24-H),6.20(1H,d,J=14.0 Hz,22-H),4.92(1H,d,J=7.5 Hz,3-glc-1′-H),5.38(1H,d,J=7.5 Hz,2′-glc-1″-H),3.92(1H,m,12-H),3.30(1H,m,3-H),2.90(1H,m,17-H),2.25,2.05,1.30,1.30,1.12,1.02,0.98,0.80(each 3H,s,26,27,21,28,29,19,30,18-H).13C-NMR(75.4 MHz,C5D5N):39.2(1-C),26.7(2-C),88.9(3-C),39.7(4-C),56.4(5-C),18.4(6-C)35.4(7-C),40.2(8-C),50.8(9-C),37.0(10-C),32.9(11-C),71.6(12-C),52.4(13-C),51.2(14-C),32.7(15-C),29.6(16-C),51.1(17-C),16.4(18-C),15.8(19-C),71.7(20-C),29.9(21-C),128.4(22-C),140.39(23-C),122.0(24-C),135.0(25-C),27.1(26-C),14.8(27-C),28.1(28-1),16.6(29-C),17.0(30-C),105.1(3-glc-1′-C),83.5(3-glc-2′-C),78.1(3-glc-3′-C),71.7(3-glc-4′-C),78.3(3-glc-5′-C),62.8(3-glc-6′-C),106.0(2′-glc-1″C),77.1(2′-glc-2″C),78.3(2′-glc-3″C),71.6(2′-glc-4″C),78.2(2′-glc-5″C),62.7(2′-glc-6″C)作者单位:李平亚(白求恩医科大学基础医学院,长春 130021)王金辉(白求恩医科大学基础医学院,长春 130021)李平亚 王金辉 李铣, 百拇医药