Synonym
4-(formylamino)-1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-3-one ; 4-Formylamino Antipyrine|4-(formylamino)-1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-3-one ;;|4-Formylamino Antipyrine|4-Formylaminoantipyrine|Metamizole Impurity A;|N-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide|N-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide;