Propanedinitrile, 2,2'-[(3,3''',3'''',4'-tetraoctyl[2,2':5',2'':5'',2''':5''',2''''-quinquethiophene]-5,5''''-diyl)bis[methylidyne(3-ethyl-4-oxo-5,2-thiazolidinediylidene)]]bis- [ 1801872-28-5 ]