Phthalazine
                            Order
                            28271-03-6
                            
                                1H-Furo[3',4':5,6]pyrido[2,1-a]phthalazine-11,12-dicarboxylicacid, 3,3a,10b,12a-tetrahydro-1,3-dioxo-
                            
                        
                        
                        
                            Order
                            66267-97-8
                            
                                5H,14H-4a,14a-Epoxyphthalazino[2,3-b]phthalazine-7,12-dione,8-chloro-1,2,3,4-tetrahydro-