1-Ethyl-3-methyl-5-(3,4-dimethylphenyl)biuret hemihydrate 76267-21-5 Imidodicarbonic diamide, N-(3,4-dimethylphenyl)-N'-ethyl-2-methyl-, hemihydrate N-(3,4-Dimethylphenyl)-N'-ethyl-2-methylimidodicarbonic diamide hemihydrate