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4-Chloropyridine-2-carboxylic acid5470-22-4 4-Ethyl-2-methyl-2-octenoic acid6975-97-9 4-Fluoro-1-naphthoic acid573-03-5 4-Fluoro-3-(trifluoromethyl)benzeneacetic acid220227-47-4 4-Fluoro-3-nitrobenzoic acid453-71-4 4-Fluorophthalic acid320-97-8 4-Guanidinobenzoic acid hydrochloride42823-46-1 4-Hydroxynicotinic acid609-70-1 4-Hydroxypyridine-2-carboxylic acid22468-26-4 4-Isopropylphenoxyacetic acid1643-16-9 4-Methoxy-3-methylphenylacetic acid4513-73-9 4-Methyl-2-(trifluoromethyl)benzoic acid120985-64-0 4-Methyl-3-(trifluoromethyl)benzoic acid261952-01-6 4,4-Difluorocyclohexanecarboxylic acid122665-97-8 4,4,4-Trifluoro-2-methylbutanoic acid99783-23-0 4,4'-Diamino-[1,1'-biphenyl]-2,2'-dicarboxylic acid17557-76-5 4,4'-Dinitrodiphenic acid20246-81-5 4,4′-(1,2-Ethenediyl)bis[benzoic acid]100-31-2 4,5-Difluorophthalic acid18959-31-4 4'-Methylbiphenyl-3-carboxylic acid147404-69-1