3.beta.,20.alpha.-Yohimban-16.beta.-carboxylic acid, 17.alpha.,18.beta.-dihydroxy-, methyl ester, 17-(3,4,5-trimethoxybenzoate) 483-07-8 ISORAUNESCINE Isoraunescin NSC72121 Yohimban-16-carboxylic acid, 18-hydroxy-17-[(3,4,5-trimethoxybenzoyl)oxy]-, methyl ester, (3.beta.,16.beta.,17.alpha.,18.beta.,20.alpha.)-