5001-82-1 53445-28-6 53988-08-2 EINECS 225-671-9 Imidazo(4,5-d)imidazole-2,5(1H,3H)-dione, tetrahydro-1,3,4-tris(hydroxymethyl)- Tetrahydro-1,3,4-tris(hydroxymethyl)imidazo(4,5-d)imidazole-2,5(1H,3H)-dione Trimethylolacetylenediureine