3a,6a-dimethyl-1,3,4,6-tetrahydroimidazo[4,5-d]imidazole-2,5-dione

二甲基乙二肟

1-hydroxy-2,4,5-trimethyl-3-oxidoimidazol-3-ium

(3aRS,6aSR)-1,3,3a,6a-tetrahydro-1-hydroxy-3a,6a-dimethyl-5H-pyrrolo<3,4-d>imidazole-2,4,6-trione

1-hydroxytetrahydro-4,5-dimethyl-2-oxoimidazole-4,5-dicarboxylic acid