Synonyms: Copper,[2,9,16,23-tetrakis(1,1-dimethylethyl)-29H,31H-phthalocyaninato(2-)-N29,N30,N31,N32]-,(SP-4-1)-; 29H,31H-Phthalocyanine, 2,9,16,23-tetrakis(1,1-dimethylethyl)-,copper complex; 29H,31H-Phthalocyanine, copper deriv.;2,9,16,23-Tetra-tert-butyl-29H,31H-phthalocyanine copper; 4,4',4'',4'''-Tetra-tert-butylphthalocyaninecopper(II); Copper 2,9,16,23-tetra-tert-butyl phthalocyanine; Copper2,9,16,23-tetrakis(tert-butyl)-29H,31H-phthalocyanine; Coppertetra-4-tert-butylphthalocyanine