Binaltorphimine

(4bS,8R,14aS)-7,12-Bis(cyclopropylmethyl)-5,6,7,8,9,10,11,12,19aα,20bβ-decahydro-4,8α:11β,15-dimethano-20H-bisbenzofuro[2,3-a:3',2'-i]dipyrido[4,3-b:3',4'-h]carbazole-1,8aβ,10aα,18-tetrol