1H-Pyrazole-3-carboxylic acid, 4-amino-5-(2-chlorophenyl)-, ethyl ester, monohydrochloride 3-Pyrazolecarboxylic acid, 4-amino-5-(o-chlorophenyl)-, ethyl ester, hydrochloride 4-Amino-5-(o-chlorophenyl)-3-pyrazolecarboxylic acid ethyl ester hydrochloride 91857-41-9