Crystal structure and NMR analysis of the alkaloid protostemotinine

Crystal structure and NMR analysis of the alkaloid protostemotinine Alkaloids from Roots ofStemona sessilifoliaand Their Antitussive Activities The crystal structure of a new alkaloid, stemofoline, from Stemona japonica Stemoninine-type alkaloids from the roots ofStemona sessilifolia A new alkaloid from Stemona sessilifolia Structures of new alkaloids sessilifoliamides A–D from Stemona sessilifolia Structures of four new alkaloids from Stemona sessilifolia Sessilifoliamide I, a New Alkaloid from Stemona sessilifolia Structures of stemona-amine B and stemona-lactams M–R Structures of four new alkaloids from Stemona sessilifolia