Synonyms: Cuprate(3-),[m-[3-[[3,3'-dihydroxy-4'-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-2,7-naphthalenedisulfonato(7-)]]di-,trisodium (9CI);2,7-Naphthalenedisulfonic acid,3-[[3,3'-dihydroxy-4'-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-,copper complex