((1-Methyl-5-nitro-1H-imidazol-2-yl)methylene)propanedioic acid dimethyl ester 94855-74-0 BRN 3624134 Dimethyl ((1-methyl-5-nitro-1H-imidazol-2-yl)methylene)propanedioate Propanedioic acid, ((1-methyl-5-nitro-1H-imidazol-2-yl)methylene)-, dimethyl ester