玉竹化学成分研究(2)
MS(m/z)正离子检测:441[M+Na]+,负离子检测:417[M—H]-,相对分子质量418,分子式C22H26O8。1H-NMR(500 MHz,CDCl3)δ,ppm:6.58(4H,s,H-2,6,2’,6’),4.73(2H,d,J=4.1Hz,H-7,7’),4.28(2H,dd,J=9.3,6.8 Hz,H-9a,9a’),3.91(12H,s,-OCH3),3.91(2H,dd,overlapped,H-9b,9b’),3.09(2H,m,H-8,8’)。13C-NMR(125 MHz,CDCl3)δ,ppm:147.2(C-3,3’),147.2(C-5,5’),134.4(C-4,4’),132.1(C-1,1’),102.8(C-2,2’),102.8(C-6,6,),86.1(C-7,7,)1 71.8(C-9,9,),56.4(-OCH3),54.4(C.8,8’)。1H-NMR和13C-NMR数据与文献的(-)-丁香树脂酚一致,鉴定为(-)-丁香树脂酚。
化合物IV:白色针状结晶(氯仿.甲醇)。ESI.MS(m/z)正离子检测:43 l[M+H]+,453[M+Na]+,相对分子质量430,分子式C27H42O4。1H-NMR(500 MHz,CDCl3)δ,ppm:3.50(1H,m,H-3),5.38(1H,t,J,=3.0 Hz,H-6),4.63(1H,m,C-16),0.94(3H,s,H-18),1.05(3H,s,H-19),1.08(3H,d,J=7.1 Hz,H-21),3.94(1H,dd,J=11.1,2.7 Hz,H-26a),3.30(IH,d,J=11.1 Hz,H-26b),1.01(3H,d,J=6.9 Hz,H-27)。13)C-NMR(125 MHz,CDCl3)δ,ppm:140.4(C-5),121.5(C-6),110.1(C-22),87.5(C-14),81.0(C-16),71.7(C-3),65.2(C-26),58.8(C-17),44.5(C-13),43.4(C-9),42.3(C-4),42.2(C-20),39-3(C-15),37.4(C-1),37.0(C-10),34.9(C·8),31.7(C-12),31.7(C-2),27.2(C-25),26.1(C-23),26.1(C-24),25.9(C·7),19.9(C-19),19.7(C-11),19.3(C-18),16.2(C-27),14.6(C-21)。其1H-NMR和13C-NMR数据与文献的3β,14α-二羟基-(25S)-螺甾烷醇-5-烯一致,鉴定为3β,14α-二羟基-(25S)-螺甾烷醇-5-烯。
化合物V:白色针状结晶(石油醚)。相对分子质量414,分子式C29H50O。与β-谷甾醇标准品共薄层,Rf值和斑点颜色均一致,且混合熔点不下降,鉴定为β-谷甾醇。, 百拇医药(李海明 白 虹 李 巍 王元书 赵焕新)
化合物IV:白色针状结晶(氯仿.甲醇)。ESI.MS(m/z)正离子检测:43 l[M+H]+,453[M+Na]+,相对分子质量430,分子式C27H42O4。1H-NMR(500 MHz,CDCl3)δ,ppm:3.50(1H,m,H-3),5.38(1H,t,J,=3.0 Hz,H-6),4.63(1H,m,C-16),0.94(3H,s,H-18),1.05(3H,s,H-19),1.08(3H,d,J=7.1 Hz,H-21),3.94(1H,dd,J=11.1,2.7 Hz,H-26a),3.30(IH,d,J=11.1 Hz,H-26b),1.01(3H,d,J=6.9 Hz,H-27)。13)C-NMR(125 MHz,CDCl3)δ,ppm:140.4(C-5),121.5(C-6),110.1(C-22),87.5(C-14),81.0(C-16),71.7(C-3),65.2(C-26),58.8(C-17),44.5(C-13),43.4(C-9),42.3(C-4),42.2(C-20),39-3(C-15),37.4(C-1),37.0(C-10),34.9(C·8),31.7(C-12),31.7(C-2),27.2(C-25),26.1(C-23),26.1(C-24),25.9(C·7),19.9(C-19),19.7(C-11),19.3(C-18),16.2(C-27),14.6(C-21)。其1H-NMR和13C-NMR数据与文献的3β,14α-二羟基-(25S)-螺甾烷醇-5-烯一致,鉴定为3β,14α-二羟基-(25S)-螺甾烷醇-5-烯。
化合物V:白色针状结晶(石油醚)。相对分子质量414,分子式C29H50O。与β-谷甾醇标准品共薄层,Rf值和斑点颜色均一致,且混合熔点不下降,鉴定为β-谷甾醇。, 百拇医药(李海明 白 虹 李 巍 王元书 赵焕新)