136511-32-5 17464-88-9 30663-28-6 EINECS 241-480-3 Imidazo(4,5-d)imidazole-2,5(1H,3H)-dione, tetrahydro-1,3,4,6-tetrakis(methoxymethyl)- Tetrahydro-1,3,4,6-tetrakis(methoxymethyl)imidazo(4,5-d)imidazole-2,5(1H,3H)-dione