[Studies on the alkaloids of radix Sophorae Tonkinensis]

Six alkaloids were isolated from Radix Sophorae Tonkinensis. On the basis of spectrometric analysis and physico-chemical constants they were identified as (I) (+)-matrine, (II) (-)-cytisine, (III) (+)-matrine N-oxide, (IV)(+)-sophocarpine N-oxide, (V)(+)-sophoramine and (VI) (+)-sophoranol respectively. (II), (IV), (V) and (VI) were isolated for the first time from Radix Sophorae Tonkinensis.