2-(1-ethyl-2-methylindole-3-carbonyl)-5-nitrobenzoic acid

2-(2,6-dioxopiperidin-3-yl)-5-nitroisoindole-1,3-dione

2-(2-hydroxyethyl)-5-nitroisoindole-1,3-dione

isoanthraflavin

2-nitroanthracene-9,10-dione