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organic compounds
The structure of the title compound, C29H26O4, prepared from 1-(6-methoxy-2-naphthyl)propan-1-one and ethyl ortho-formate in the presence of boron trifluoride under microwave irradiation, consists of connected 7-methoxy-2-methyl-2,3-dihydro-1H-cyclopenta[a]naphthalen-3-one and 1-(6-methoxy-2-naphthyl)propan-1-one units. The space group, Pc, is non-centrosymmetric but achiral; three chiral centres exist in the molecule, but both enantiomers are present in the crystal.