3,6-dimethyl-4,6-dihydro-3H-imidazo[4,5-d]oxazole-2,5-dione

acetyl-methyl-imidazolidinetrione

硝酸

3-甲基-2,4-二氧代-1-咪唑烷甲酰胺

1-methyl-5-hydroxyhydantoin-5-carboxamide