1-Methyl-3-((1-methyl-4-nitro-1H-imidazol-2-yl)methylene)-2-pyrrolidinone 123794-13-8 2-Pyrrolidinone, 1-methyl-3-((1-methyl-4-nitro-1H-imidazol-2-yl)methylene)- BRN 4814183