Paxillarines A and B, new steroidal alkaloids from Pachysandra axillaris, and conformation of their ring A moieties
Qui, MH ; Nie, RL ; Nakamura, N ; Kikuchi, T
1996
发表期刊CHEMICAL & PHARMACEUTICAL BULLETIN
ISSN0009-2363
卷号44期号:11页码:2015-2019
摘要Two new steroidal alkaloids, paxillarines A (1) and B (2), were isolated from Pachysandra axillar is. Their structures were determined by means of spectrometric methods as 3 alpha-N-methylbenzoylamino-4 beta-acetoxy-16 beta-hydroxy-20 alpha-dimethylamino-5 alpha-pregnane and 3 alpha-N-methylbenzoylamino-4 beta-acetoxy-12 beta-hydroxy-20 alpha-dimethylamino-5 alpha-pregnane, respectively. Some of the expected characteristic H-1-NMR signals were not observed due to hindered rotation when the spectra were measured on a 400 MHz spectrometer, although all of the signals appeared clearly on a 90 MHz machine, The conformation of the ring A moiety of these alkaloids is discussed.
关键词Nmr Paxillarine a Paxillarine b Pachysandra Axillaris Rotational Isomerism Steroidal Alkaloid
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/4070
专题植物化学与西部植物资源持续利用国家重点实验室
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Qui, MH,Nie, RL,Nakamura, N,et al. Paxillarines A and B, new steroidal alkaloids from Pachysandra axillaris, and conformation of their ring A moieties[J]. CHEMICAL & PHARMACEUTICAL BULLETIN,1996,44(11):2015-2019.
APA Qui, MH,Nie, RL,Nakamura, N,&Kikuchi, T.(1996).Paxillarines A and B, new steroidal alkaloids from Pachysandra axillaris, and conformation of their ring A moieties.CHEMICAL & PHARMACEUTICAL BULLETIN,44(11),2015-2019.
MLA Qui, MH,et al."Paxillarines A and B, new steroidal alkaloids from Pachysandra axillaris, and conformation of their ring A moieties".CHEMICAL & PHARMACEUTICAL BULLETIN 44.11(1996):2015-2019.
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