Synonyms: Nickel, (29H,31H-phthalocyaninato(2-)-kappaN29,kappaN30,kappaN31,kappaN32)-, ((3-((1,3-dioxobutyl)amino)phenyl)amino)sulfonyl derivs.;Nickel, (29H,31H-phthalocyaninato(2-)-N29,N30,N31,N32)-, ((3-((1,3-dioxobutyl)amino)phenyl)amino)sulfonyl derivs.