126663-44-3 4H-(1,2,4)Triazino(3,4-a)phthalazin-4-one, 7-ethoxy-3-(4-methoxyphenyl)- 7-Ethoxy-3-(4-methoxyphenyl)-4H-(1,2,4)triazino(3,4-a)phthalazin-4-one