2,7-Naphthalenedisulfonicacid, 4-hydroxy-3-[[2-methoxy-5-methyl-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-(9CI); 2,7-Naphthalenedisulfonic acid,4-hydroxy-3-[[4-[(2-hydroxyethyl)sulfonyl]-6-methoxy-m-tolyl]azo]-, 2-(hydrogensulfate) (8CI)
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