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4-Bromo-2,6-pyridinedicarboxylic Acid162102-81-0 4-Chloro-1H-pyrrolo(2,3-b)pyridine-5-carboxylic acid920966-03-6 4-Chloro-2-nitrobenzoic acid6280-88-2 4-Chloronaphthalene-1-carboxylic acid1013-04-3 4-Cyclohexylbenzoic acid20029-52-1 4-Ethyl-3-iodo-α,α-dimethylbenzeneacetic acid1256584-73-2 4-Fluoro-2-methoxybenzoic acid395-82-4 4-Fluoro-3-methoxybenzoic acid82846-18-2 4-Fluoro-D-phenylalanine18125-46-7 4-Fluoro-D-phenylalanine hydrochloride122839-52-5 4-Fluorobutanoic acid462-23-7 4-Hydroxy-2,6-dimethylbenzoic acid75056-97-2 4-Hydroxy-3-nitrobenzoic acid616-82-0 4-Hydroxycyclohexanecarboxylic acid17419-81-7 4-Isoxazolecarboxylic acid6436-62-0 4-Methoxy-1H-indole-3-carboxylic acid203937-50-2 4-Methyl-2-[4-(trifluoromethyl)phenyl]-5-thiazolecarboxylic acid144059-86-9 4-Methyl-2-thiazolecarboxylic acid14542-16-6 4-Methylnonanoic acid45019-28-1 4-tert-Butoxycarbonylamino-piperidine-1,4-dicarboxylic acid mono-tert-butyl ester189321-65-1