Ethanesulfonicacid,2-[methyl[6'-[[2-[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]ethyl]amino]spiro[3H-2,1-benzoxathiole-3,9'-[9H]xanthen]-3'-yl]amino]-,S,S-dioxide; Spiro[3H-2,1-benzoxathiole-3,9'-[9H]xanthene], ethanesulfonic acidderiv.
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