2-[cyclopentyl-[2-sulfanyl-3-(trifluoromethyl)benzoyl]amino]acetic acid
2-[cyclopentyl-[[2-mercapto-3-(trifluoromethyl)phenyl]-oxomethyl]amino]acetic acid
2-[cyclopentyl-[2-mercapto-3-(trifluoromethyl)benzoyl]amino]acetic acid
2-[cyclopentyl-[2-sulfanyl-3-(trifluoromethyl)phenyl]carbonyl-amino]ethanoic acid