10-Chloro-N,N-diethyl-4-oxo-3-phenyl-4H-pyrido(2,1-a)phthalazine-1-carboxamide 110924-85-1 4H-Pyrido(2,1-a)phthalazine-1-carboxamide, 10-chloro-N,N-diethyl-4-oxo-3-phenyl- N,N-Diethyl-10-chloro-4-oxo-3-phenyl-4H-pyrido(2,1-a)phthalazine-1-carboxamide