10095-06-4 2,4,6,8-Tetramethyl-2,4,6,8-tetraazobicyclo(3.3.0)octane-3,7-dione 2,4,6,8-Tetramethyl-2,4,6,8-tetraazobizykl(3,3,0)oktandion-3,7 [German] 65407-24-1 Imidazo(4,5-d)imidazole-2,5(1H,3H)-dione, tetrahydro-1,3,4,6-tetramethyl- Mebicar Tetrahydro-1,3,4,6-tetramethylimidazo(4,5-d)imidazole-2,5(1H,3H)-dione mebikar