A poisonous alkaloid,C21H26N2O3,derived from the bark of a tree,Corynanthe yohimbe,and formerly used as an aphrodisiac,a local anesthetic,and a mydriatic.

• 育亨宾（宁碱），一种毒性生物碱，C21H26N2O3，从育亨宾树的树皮中提炼出来，以前被用作春药、局部麻醉剂和散瞳药。