5 1 2-dihydroquinoline 2 3-b acridine-7 14-dione July 8, 2019 16 32 64 128 5 12-dihydroquino 2 3-b acridine-7 14-dione 5 12-dihydro-2 9-dimethylquino 2 3-b acridine-7 14-dione 1 4-dioxin 2 3-dihydro- Quino 2 3-b acridine-7 14-dione 5 12-dihydro-2 9-dimethyl- 1 2-dihydro-2 2 4-trimethyl-quinoline
