2,7-naphthalenedisulfonic acid, 4-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophen

disodium 4-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate

2,7-Naphthalenedisulfonic acid, 4-2,4-dihydroxy-5-(2-hydroxy-3,5-dinitrophenyl)azo-3-(4-nitrophenyl)azophenylazo-5-hydroxy-, disodium salt

4-[[2,4-Dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

4-[[2,4-Dihydroxy-3-[(4-nitrophenyl)azo]-5-[(3,5-dinitro-2-hydroxyphenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid,disodium salt

4-[[2,4-Dihydroxy-3-[(4-nitrophenyl)azo]-5-[(3,5-dinitro-2-hydroxyphenyl) azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt