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The title compound [systematic name: (±)-5-({4-[2-(5-ethyl-2-pyridinio)ethoxy]phenyl}methyl)thiazolidine-2,4-dione chloride], C19H21N2O3S+·Cl−, is an oral antidiabetic agent. In the crystal structure, the molecules are linked by N—H⋯Cl hydrogen bonds into chains.
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Yathirajan et al. (2004) studied this question.
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