(4R,4aR,7R,7aR,12bR,15S)-3-(cyclopropylmethyl)-7,9-dimethoxy-15-methyl-1,2,3,4,7,7a-hexahydro-7,4a-(epithiomethano)-4,12-methanobenzofuro[3,2-e]isoquinoline

N-cyclopropylmethyl-14β-ethyl-4-hydroxy-3-methoxymorphinan-6-one