6b,7,10,10a-tetrahydrofluoranthen-7-yl acetate

acetic acid,anthracene-1,10-diol

(1,3,5-trioxo-7-oxa-2,4-diazaspiro[5.5]undec-9-en-8-yl) acetate

d,l-(1,3-Dioxoindan)-2-spiro-(6'-acetoxy-3',6'-dihydro-2'H-pyran)

(1',3'-dioxospiro[3,4-dihydropyran-2,2'-indene]-4-yl) acetate