2-Thiophenecarboxaldehyde,4,4'-(3,3,4,4,5,5-hexafluoro-1-cyclopentene-1,2-diyl)bis[5-methyl-;1,2-bis(5'-formyl-2'-methylthien-3'-yl)perfluorocyclopentene;1,2-bis(5'-formyl-2'-methyl-3'-thiophene)perfluorocyclopentene
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