2',4'-Diamino-2-hydroxy-5-nitroazobenzene-3-sulfonic acid
2',4'-Diamino-2-hydroxy-5-nitroazobenzene-3-sulfonic acid ??
??
2',4'-Diamino-2-hydroxy-5-nitroazobenzene-3-sulfonic acid C??? ??, ??, ??
2',4'-Diamino-2-hydroxy-5-nitroazobenzene-3-sulfonic acid ?? ?? ? ???
???
?? ??
2',4'-Diamino-2-hydroxy-5-nitroazobenzene-3-sulfonic acid ?? ??
???( 0)?? ??