4H-Thieno[2′′,3′′:1′,2′]indeno[5′,6′:5,6]-s-indaceno[1,2-b]thiophene-2,9-dicarboxaldehyde, 4,4,7,7-tetrahexyl-7,12-dihydro-12,12-dioctyl- [ 2102523-41-9 ]