164071-31-2 2,6-Dihydro-4-(acetyloxy)-2,6,7-trimethylpyrido(3,4-d)pyridazine-1,5-dione Pyrido(3,4-d)pyridazine-1,5-dione, 2,6-dihydro-4-(acetyloxy)-2,6,7-trimethyl-