2 – 2′-[[12 – 13-Bis(2-ethylhexyl)-12 – 13-dihydro-3 – 9-diundecylbisthieno[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 – 6-difluoro-3-oxo-1H-indene-2 – 1(3H)-diylidene)]]bis[propanedinitrile]

2 – 2′-Bipiperidine