Absolute configuration of N-[(–)-2-(7-methoxy-1,2,3,4-tetra­hydro­-1-naphthyl)­ethyl]­cyclo­propyl­carbox­amide,a highly potent and selective melatonin analogue

The title compound, C₁₇H₂₃NO₂, a tetra­hydro­naphthalenic analogue of melatonin, crystallizes in the monoclinic space group P2₁ with one mol­ecule in the asymmetric unit. The crystal structure has been determined by X-ray analysis at room temperature. The absolute configuration of this compound was determined unambiguously as R at the chiral naphthalene C-1 position.