9,10-dihydroxy-5-methoxy-2'-methyl-4'-methylene-1H-spiro[anthracene-2,1'-cyclopentan]-1-one

2-chloromethyl-1,4-pentadiene

1-(2'-methylene-4'-pentenoxy)-5-methoxyanthraquinone

1-hydroxy-5-methoxy-2-(2-methylenepent-4-en-1-yl)anthracene-9,10-dione