phenyl (2-nitrophenyl)methanesulfonate

1-(9,10-dioxoanthracen-1-yl)anthracene-9,10-dione

phthalazino[2,3-b]phthalazine-5,7,12,14-tetrone

2-acetyl-1-hydroxyxanthen-9-one

2-(2-nitrophenyl)naphthalene