4,4'-bis[[6-anilino-4-[(2-hydroxypropyl)amino]-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulphonic acid;2,2'-(1,2-Ethenediyl)bis[5-[[4-[(2-hydroxypropyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid]
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