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4-Bromoquinoline-6-carboxylic acid219763-87-8 4-Chloro-2-fluoro-5-nitrobenzoic acid35112-05-1 4-Chloro-2,3-difluorobenzoic acid150444-94-3 4-Chloro-2,5-difluorobenzoic acid132794-07-1 4-Chloro-3-(chlorosulfonyl)-5-nitrobenzoic acid22892-95-1 4-Chloro-3-(chlorosulphonyl)benzoic acid2494-79-3 4-Chloro-D-phenylalanine hydrochloride147065-05-2 4-Cyano-3-nitrobenzoic acid153775-42-9 4-Fluoro-2-iodobenzoic acid56096-89-0 4-Fluoro-2-methylbenzoic acid321-21-1 4-Fluoro-2-nitrobenzoic acid394-01-4 4-Fluoro-3-hydroxybenzoic acid51446-31-2 4-Fluorooxane-4-carboxylic acid1150617-62-1 4-Hydroxy-3-methoxy-5-nitrobenzoic acid15785-54-3 4-Hydroxy-6-(trifluoromethoxy)-3-quinolinecarboxylic acid175203-86-8 4-Hydroxy-8-(trifluoromethyl)-3-quinolinecarboxylic acid23779-95-5 4-Iodopyridine-2-carboxylic acid405939-79-9 4-Methoxy-1H-indole-2-carboxylic acid103260-65-7 4-Methyl-1,3-oxazole-5-carboxylic acid2510-32-9 4-Methylcyclohexanecarboxylic acid4331-54-8