Protopine-N-oxide, an alkaloid from Bocconia cordata

Protopine-N-oxide, an alkaloid from Bocconia cordata Alkaloids from Bocconia frutescens L. Leptocarpine, a New Protopine Alkaloid Alkaloids of Zanthoxylum conspersipunctatum (Rutaceae): The structure of a new alkaloid isomeric with protopine Crystal structure and NMR analysis of the alkaloid protostemotinine A Minor Pyrrolizidine Alkaloid from<i>Heliotropium bovei</i> Alkaloids of Sophora alopecuroides Pronuciferine N-Oxide, a Proaporphine N-Oxide Alkaloid from Berberis coletioides Buchananine, a novel pyridine alkaloid from Cryptolepis buchanani Structure of convosine