1-(2-Hydroxyimino-3-oxobutyryl)-2-methyl-2-nitroso-1-phenylhydrazine 105553-32-0 2,3-Dioxobutyric acid 2-methyl-2-nitroso-1-phenylhydrazide 2-oxime BUTYRIC ACID, 2,3-DIOXO-, 2-METHYL-2-NITROSO-1-PHENYLHYDRAZIDE, 2-OXIME CCRIS 2042