4-[3-[(2-cyclopentyl-6,7-dimethyl-1-oxo-2,3-dihydroinden-5-yl)oxymethyl]phenyl]benzoic acid 4-[3-[(2-cyclopentyl-6,7-dimethyl-1-oxo-indan-5-yl)oxymethyl]phenyl]benzoic acid 4-[3-[(2-cyclopentyl-6,7-dimethyl-1-oxo-5-indanyl)oxymethyl]phenyl]benzoic acid 4-[3-[(2-cyclopentyl-1-keto-6,7-dimethyl-indan-5-yl)oxymethyl]phenyl]benzoic acid