L-Tetrahydropalmatine, Oxostephanine and Dehydrocrebanine Isolated from 

Stephania dielsiana Y. C. WU Tubers

By repeated chromatography on silica gel column, three alkaloids were isolated from the tubers of Stephania dielsiana Y. C. Wu. Their chemical structures were determined as L-tetrahydropalmatine (1), oxostephanine (2) and dehydrocrebanine (3) on the basis of the NMR and MS analysis. This is the first report on 1-3 from Stephania dielsiana Y. C. Wu. in Vietnam

Keywords: Stephania dielsiana Y. C. Wu., L- tetrahydropalmatine (1), oxostephanine (2) and dehydrocrebanine (3).

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