(2S,3S,3aS,6S,8aR,9S,9aR)-2-Benzyloxymethyl-3,6-dimethyl-9-phenylsulfanylmethyl-dodecahydro-4a-aza-cyclopenta[b]naphthalene

[(2R,5S)-1-((1R,2R,3S,5S)-3-Benzyloxymethyl-5-hydroxy-2-methyl-cyclopentylmethyl)-5-methyl-piperidin-2-yl]-acetic acid ethyl ester