O-Methyldeoxopunjabine, a secobisbenzylisoquinoline alkaloid bearing an aryl methyl group, and three other secobisbenzylisoquinoline alkaloids, O-methylpunjabine, secocepharanthine, and dihydrosecocepharanthine, from Stephania sasakii.

Chemical and Pharmaceutical Bulletin
1985.0

Abstract

Two new secobisbenzylisoquinoline alkaloids, secocepharanthine (base J) (3) and O-methyl-punjabine (base K) (4), were isolated from Stephania sasakii Hayata (Menispermaceae). Their structures were established and the structures of two other alkaloids [base B (1) and base C (2)] were also established as dihydrosecocepharanthine (1) and O-methyldeoxopunjabine (2). In addition, two known bisbenzylisoquinoline alkaloids, obaberine (5) and thalrugosine (6), were newly isolated from the same plant. © 1985, The Pharmaceutical Society of Japan. All rights reserved.

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