4-Hydroxyazobenzene-3,3'-dicarboxylic acid disodium salt
4-Hydroxyazobenzene-3,3'-dicarboxylic acid disodium salt ??
??
4-Hydroxyazobenzene-3,3'-dicarboxylic acid disodium salt C??? ??, ??, ??
4-Hydroxyazobenzene-3,3'-dicarboxylic acid disodium salt ?? ?? ? ???
???
?? ??
4-Hydroxyazobenzene-3,3'-dicarboxylic acid disodium salt ?? ??
???( 0)?? ??