(1aR,2R,2aR,8aS,9S,9aS)-1a,2,2a,8a,9,9a-hexahydro-1H-2,9-ethenocyclopropa[b]anthracene-3,8-dione

2-cyclohepta-2,4,6-trien-1-ylnaphthalene-1,4-dione

acetic acid,2-phenyl-1,2-dihydrocyclobuta[b]naphthalene-3,8-diol

1-(1,4-dioxonaphthalen-2-yl)-3-phenylurea