1 ZKW 1-[(2,4-dichlorophenyl)methyl]pyrazole-3,5-dicarboxylic acid 1.000 2 M81 1-[(2-chlorophenyl)methyl]pyrazole-3,5-dicarboxylic acid 0.950 3 MZS 1-[(4-fluorophenyl)methyl]pyrazole-3,5-dicarboxylic acid 0.857