SEARCH Articles Figures Tables 4-Benzyl-2- [4-phenyl -phthalazinone 4-Chloro-2-phenyl-1 -phthalazinone 7- Bromo-2-phenyl-1 -phthalazinone 7- Nitro-2-phenyl-1 -phthalazinone Phthalazinone Phthalazinones