Alkaloids of Uncaria pteropoda. Isolation and structures of pteropodine and isopteropodine

Abstract

Two new alkaloids designated as pteropodine and isopteropodine have been isolated from Uncaria pteropoda and characterised. They are stereoisomeric with mitraphylline and uncarine-A and -B and have been shown to have the same structure as these alkaloids on the basis of structural and degradative evidence.