1,2-Naphthoquinone 2-semicarbazone 1,2-Naphthoquinone, monosemicarbazone 1,2-Naphthoquinone, semicarbazone 2-(Oxonaphthalenylidene)hydrazinecarboxamide 31853-38-0 Hydrazinecarboxamide, 2-(oxonaphthalenylidene)- beta-Naphthoquinone semicarbazone