(1,2-Dihydroxyethylene)urea 2-Imidazolidinone, 4,5-dihydroxy- 3720-97-6 4,5-Dihydroxy-2-imidazolidinone 4,5-Dihydroxyethyleneurea 4,5-Dihydroxyimidazolidone-2 4,5-Dihydroxytetrahydroimidazol-2-one Acetylene monourein Dihydroxyethyleneurea Glyoxalmonourein Glyoxalmonoureine Glyoxalurea NSC57542