1,2-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-on 4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzoesaeure 3-Amino-1-(2,4,6-trichlorphenyl)-5-pyrazolon 5-Oxo-1-phenyl-2-pyrazolin-3-carbonsure Dinatrium-4,4'-bis(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-ylazo)-1,1'-biphenyl-2,6'-disulfonat m-(4,5-Dihydro-5-imino-3-methyl-1H-pyrazol-1-yl)benzolsulfonsure 3,3'-Dimethyl-1,1'-diphenyl-4,4'-bi-5-pyrazolon 4-Benzoyl-3-methyl-1-phenylpyrazol-5-on 4-Chlor-3-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzolsulfonsure Ethyl-5-oxo-1-phenyl-2-pyrazolin-3-carboxylat 3-Amino-1-phenyl-5-pyrazolon 4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzolsulfonsure 3-Methyl-1-p-tolyl-5-pyrazolon m-(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzolsulfonamid 5-Oxo-1-(4-sulfophenyl)-2-pyrazolin-3-carbonsC$ure 4,5-Dihydro-1H-pyrazol 3-Methyl-4-nitro-1-p-nitrophenyl-5-pyrazolon 3-Methyl-1-(4-nitrophenyl)-5-pyrazolon