: an alkaloid C21H26N2O3 obtained from the bark of the yohimbe that is a weak blocker of alpha-adrenergic receptors and has been used as an aphrodisiac
: an alkaloid obtained from the bark of yohimbe that is a weak blocker of alpha-adrenergic receptors and has been used in the form of its hydrochloride C21H26N2O3路HCl as a mydriatic and aphrodisiac and to treat male impotence