2,2'- [[12,13-Bis(2-octyldodecyl)-12,13-dihydro-3,9-dinonylbisthieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2-e:2',3'-g][2,1,3]benzothiadiazole-2,10-diyl]bis[methylidyne(5 or 6-bromo-3-oxo-1H-indene-2,1(3H)-diylidene) ]]bis[propanedinitrile]