黔产乌头的二萜生物碱类成分研究(3)
化合物Ⅱ:白色粉末,分子式为C22H31NO3。1H-NMR(CDCl3,400 MHz)δH:5.27、5.19(brs,各1H,H-17),4.34(s,1H,H-15),3.82(dd,J=9.0、6.8 Hz,1H,H-1),3.44(brs,1H,H-20),1.06(t,J=7.2 Hz,3H,NCH2CH3),0.75(s,3H,Me-18)。13C-NMR(CDCl3,100 MHz)δC:70.4(d,C-1),31.7(t,C-2),37.4(t,C-3),34.3(s,C-4),49.2(d,C-5),23.3(t,C-6),43.6(d,C-7),50.0(s,C-8),35.3(d,C-9),52.5(s,C-10),38.3(t,C-11),210.3(s,C-12),53.9(d ......
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