4-Hydroxy-3-[[1-sulfo-6-[[2-(sulfooxy)ethyl]sulfonyl]-2-naphthalenyl]azo]-2,7-naphthalenedisulfonic acid;4-Hydroxy-3-[[1-sulfo-6-[[2-(sulfooxy)ethyl]sulfonyl]-2-naphtyl]azo]-2,7-naphthalenedisulfonic acid
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