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4-Boc-3(R)-morpholinecarboxylic acid869681-70-9 4-Bromo-2-(trifluoromethyl) benzoic acid320-31-0 4-Bromo-2,5-difluorobenzoic acid28314-82-1 4-Bromo-3-(trifluoromethyl)benzoic acid161622-14-6 4-Bromopyridine-3-carboxylic acid15366-62-8 4-Carboxy-3-chlorophenylboronic acid136496-72-5 4-Chloro-2-(trifluoromethyl)benzoic acid142994-09-0 4-Chloro-3-hydroxybenzoic acid34113-69-4 4-Chloro-β-[[(1,1-dimethylethoxy)carbonyl]amino]benzenepropanoic acid284493-65-8 4-Cyano-3-fluorobenzoic acid176508-81-9 4-Cyanobutanoic acid39201-33-7 4-Dimethylaminobutyric acid hydrochloride69954-66-1 4-Ethynylbenzoic acid10602-00-3 4-Fluoro-2-(trifluoromethyl)benzoic acid141179-72-8 4-Fluorotryptophan25631-05-4 4-Hydroxyisoleucine21704-86-9 4-Isobutylbenzoic acid38861-88-0 4-Methoxy-2-quinolinecarboxylic acid15733-83-2 4-Methoxy-3-methylbenzoic acid6880-04-2 4-Methoxy-3-nitrobenzoic acid89-41-8