1,2,4-Triazolo(3,4-a)phthalazine, 3-((3-bromo-4,5-dimethoxy)phenyl)-6-ethoxy- 3-((3-Bromo-4,5-dimethoxy)phenyl)-6-ethoxy-1,2,4-triazolo(3,4-a)phthalazine 87540-54-3