2-羟基-1,4-萘醌

苯酐

咪唑并[1,2-a]吡啶

2-chloro-6,11-dihydro-6,11-dioxo-naphtho-[2',3':4,5]imidazo[1,2-a]pyridine

2,2-dichloroindene-1,3-dione