496-46-8 Acetylene carbamide Acetylenediurea Acetylenediureine Acetyleneurea Diurea glyoxalate GLYCOLURIL Glyoxalbiuret Glyoxaldiureine Glyoxaldiurene Imidazo[4,5-d]imidazole-2,5(1H,3H)-dione, tetrahydro- NSC2765 Tetrahydroimidaz[d]imidazole-2,5-(1H,3H)-dione Tetrahydroimidazo[4,5-d]imidazole-2,5(1H,3H)-dione