A 7,8-dihydro-8-hydroxypalmatine from Enantia chlorantha

7,8-dihydro-8-hydroxypalmatine, a novel protoberberine-type alkaloid, along with palmatine, has been isolated and characterized from an anti-HIV active extract from Enantia chlorantha. The structures of the two compounds were elucidated by spectroscopic analyses and from chemical evidence.