2,2'-[[4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydrothieno [3',2':4,5]cyclopenta[1,2-b]thieno[2'',3'':3',4']cyclopenta [1',2':4,5]thieno[2,3-d]thiophene-2,7-diyl]bis[methylidyne(3-oxo1H-indene-2,1(3H)-diylidene)]]bis-propanedinitrile;