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Methyl 2-cyclopentanonecarboxylate(CMCP)

2-Phenylpropionic acid(2-PPA)

2-(4-Methylphenyl)propanoic acid(MPPA)

2-(4-Chloromethylphenyl)propionic acid(CMPPA)

2-(4-Bromomethyl)phenylpropionic acid(BMPPA)