丁公藤堿Ⅱ

白色粘狀物,[α]20/D-5.56°(C=0.90,CHCl3)。苯甲酸鹽:白色細針狀結晶(苯或丙酮),熔點160～161°,易溶于水,能溶于氯仿及熱苯,難溶于乙醚。IR λKBrmax cm\-1:3400(m),2950(m),1740(s),1640(w),1380(m),1260(s,特寬),1190(m),1035(m),1000(w),950(w),885(w);MSm/e(%):185(M+,13.5),166(1.9),142(24.4),128(10.5),126(44.8),125,108,99(100),98,96,85,83,82(47.5),81,80(93.3),70,69,68,67,57,56,45,43,41,31,30,29,28,27;高分辨MSm/e(%):185.1055(14.1),142.0876(23.6),128.0715(10.0),126.0918(47.3),125.0838(24.6),99.0687(96.3),98.0610(31.6),96.0817(10.3),82.0656(44.3),81.0573(43.6),80.0500(100.0),78.0473(18.2);NMR(CDCl3)δ:1.0～2.4(6H,m),1.98(3H,s),2.6～2.8(2H,s),3.2～3.4(1H,m),3.4～3.6(2H,m),5.0～5.2(1H,dd,J=8,3～4);13CNMR(CDCl3)δ:173.277(s),171.305(s),135.181(s),131.769(p),129.945(d),128.250(d),74.717(d),66.573(d),60.221(d),34.001(t),24.413(t),22.901(t),20.389(q)。