Synonyms: Cuprate, [7-[[4-[[5-[(5-chloro-2,6-difluoro-4-pyrimidinyl)amino]-2-methoxy-3-sulfophenyl] azo]-2-hydroxyphenyl]azo]-8-hydroxy-1,3,6-naphthalenetrisulfonato]-, tetrasodium;Cuprate(4-), [7-[[4-[[5-[(5-chloro-2,6- difluoro-4-pyrimidinyl)amino]-2-methoxy-3-sulfophenyl ]azo]-2-hydroxyphenyl]azo]-8-hydroxy-1,3,6-naphthalenetrisulfonat o(6-)]-, tetrasodium