yohimbine

/jəʊˈhɪm.biːn/

IPA: /Y OW1 HH IH0 M B AY0 N/

noun
  1. 1

    A toxic crystalline compound obtained from the bark of the yohimbe tree, used as an adrenergic blocking agent and also as an aphrodisiac in the treatment of impotence.

Source: https://en.wiktionary.org/wiki/yohimbine