Not Less Than - 95%
3-(Formylamino)-1H-pyrazole-4-carboxylic Acid Ethyl Ester; 5-Formylamino-1H-pyrazole-4
-carboxylic acid Ethyl Ester; 3-Formamidopyrazole-4-carboxylic Acid Ethyl Ester; Ethyl 3-(Formylamino)-1H-pyrazole-4-carboxylate; Ethyl 5-(formylamino)-1H-pyrazole-4-carboxylate; Allopurinol Related Compound E; (USP)