Copper(1+),[1-[(5,6,10,11,15,16,22,22-octaethyl-4,7:14,17-diimino-2,21-methano-9,12-nitrilo-12H-1-benzazacyclononadecin-3-yl)methylene]pyrrolidiniumato(2-)]-,chloride, (SP-4-2)-