1-Amino-4-({3-[(2-hydroxyethyl)sulfonyl]phenyl}amino)-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid;2-anthracenesulfonic acid, 1-amino-9,10-dihydro-4-[[3-[(2-hydroxyethyl)sulfonyl]phenyl]amino]-9,10-dioxo-
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