2,5-二苯氧基环己-2,5-二烯-1,4-二酮

anthracene-1,4,5,8-tetrone

2-(2-methoxyphenyl)cyclohexa-2,5-diene-1,4-dione

3,6-dihydroxy-2,7-dimethoxydibenzofurane

2-(2,5-dihydroxy-4-methoxyphenyl)-5-methoxycyclohexa-2,5-diene-1,4-dione