Synonyms: Copper(1+),[N-ethyl-N-[(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]ethanaminiumato(2-)]-,chloride, (SP-4-2)-; 4,7:14,17-Diimino-2,21-metheno-9,12-nitrilo-22H-1-benzazacyclononadecine,copper(1+) deriv.; CDS 2; CDS 2 (photosensitizer)