1 7ER 3,4-bis(2-fluoro-4-hydroxyphenyl)-1h-1lambda~6~-thiophene-1,1-dione 1.000 2 7G5 3,4-bis(4-hydroxyphenyl)-2,5-dihydro-1h-1lambda~6~-thiophene-1,1-dione 0.913 3 5FS 3,4-bis(4-hydroxy-2-methylphenyl)-1h-1lambda~6~-thiophene-1,1-dione 0.840 4 5G2 3,4-bis(2-chloro-4-hydroxyphenyl)-1h-1lambda~6~-thiophene-1,1-dione 0.840 5 7ES 4,4'-(thiene-2,3-diyl)bis(3-fluorophenol) 0.760