Methanesulfonic Acid → 3-[4-({[4'-(2-Ethoxyethoxy)-2',6'-dimethylbiphenyl-3-yl]methyl}amino)-2-fluorophenyl]propanoic acid methanesulfonate

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To a solution of 3-[4-({[4′-(2-ethoxyethoxy)-2′,6′-dimethylbiphenyl-3-yl]methyl}amino)-2-fluorophenyl]propanoic acid (0.372 g, 0.800 mmol) in diethyl ether (5 mL) was added methanesulfonic acid (0.0519 mL, 0.800 mmol), and the resulting crystals were washed with ethyl acetate-diethyl ether to give the title compound as colorless crystals (0.402 g, yield 90%).

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