title: Biosynthesis of ophiocarpine. Introduction of a stereospecific label through transannular cyclization.
mesh_terms: D001600:Berberine Alkaloids / Q000096:biosynthesis*; D003500:Cyclization; D010946:Plants, Medicinal / Q000378:metabolism; D013237:Stereoisomerism
chemical_list: D001600:Berberine Alkaloids; C012464:ophiocarpine