3-Chloro-5-methyl-4-[[3-[[(3-chloro-4-ethoxyphenyl)amino]carbonyl]-2-hydroxy-1-naphtyl]azo]benzenesulfonic acid sodium salt C??? ??, ??, ??

3-Chloro-5-methyl-4-[[3-[[(3-chloro-4-ethoxyphenyl)amino]carbonyl]-2-hydroxy-1-naphtyl]azo]benzenesulfonic acid sodium salt ?? ?? ? ???

???

?? ??

3-Chloro-5-methyl-4-[[3-[[(3-chloro-4-ethoxyphenyl)amino]carbonyl]-2-hydroxy-1-naphtyl]azo]benzenesulfonic acid sodium salt ?? ??