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