Synonyms: 4,8:11,15-Dimethano-20H-bisbenzofuro[2,3-a:3',2'-i]dipyrido[4,3-b:3',4'-h]carbazole-1,8a,10a,18-tetrol,7,12-bis(cyclopropylmethyl)-5,6,7,8,9,10,11,12,13,14,19a,20b-dodecahydro-20-methyl-,[8R-(4bS*,8a,8ab,10aa,11b,14aS*,19aa,20bb)]-; Binaltorphimine; NIH 10588