Synonyms: 2-Propenamide,N-[(5a,6b)-17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxymorphinan-6-yl]-3-(3-furanyl)-N-methyl-,monohydrochloride, (2E)- (9CI); 2-Propenamide, N-[(5a,6b)-17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxymorphinan-6-yl]-3-(3-furanyl)-N-methyl-,monohydrochloride, (E)-; (-)-17-(Cyclopropylmethyl)-3,14b-dihydroxy-4,5a-epoxy-6b-[N-methyl-trans-3-(3-furyl)acrylamido]morphinanhydrochloride; Nalfurafine hydrochloride; TRK 820