ALKALOIDS OF Rhinopetalum stenantherum. II. THE STRUCTURE OF STENANTHINE AND STENANTHIDINE

Article abstract of DOI:10.1007/BF00568517

From a methanolic extract of the epigeal part of Rhinopetalum stenantherum have been isolated β-chaconine (I) and the new glucoalkaloids stenanthine with mp 262-264 deg C, <α>_D 46.5 deg, C45H73NO13 (II), and stenanthidine with mp 269-271 deg C, <α>_D -47.5 deg, C39H63NO11 (III).On the basis of the facts that partial hydrolysis of trioside (II) formed the biosides (I) and (III), and that on the hydrolysis of the latter the monoside γ-chaconine was found, it may be assumed that stenanthine has the structure of solanidine 3-O-(--D-glucoside), and stenanthidine that of solanidine 3-O-.