1-Propanesulfonic acid, 3,3'-(2-butyne-1,4-diylbis(oxy))bis(2-hydroxy-;3,3'-(2-Butyne-1,4-diylbis(oxy))bis(2-hydroxypropanesulphonic) acid;3,3'-[but-2-yne-1,4-diylbis(oxy)]bis(2-hydroxypropane-1-sulfonic acid)
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