2,2-dibromo-phenalene-1,3-dione

2,3-dihydroxyphenalen-1-one

2,2-dihydroxyphenalene-1,3-dione

13H-naphtho<1',8':3,4,5>cyclohexa<1,2-b><1,4>benzothiazin-6-one

7H-phenaleno<1,2-b>quinolin-7-one