[CH3:1][C:2]1[CH:28]=[CH:27][CH:26]=[C:25]([CH3:29])[C:3]=1[O:4][C:5]1[CH:6]=[C:7]([CH:22]=[CH:23][CH:24]=1)[CH2:8][O:9][C:10]1[CH:15]=[CH:14][C:13]([CH2:16][CH2:17][C:18]([O:20]C)=[O:19])=[CH:12][CH:11]=1.[OH-].[Na+]>CO>[CH3:1][C:2]1[CH:28]=[CH:27][CH:26]=[C:25]([CH3:29])[C:3]=1[O:4][C:5]1[CH:6]=[C:7]([CH:22]=[CH:23][CH:24]=1)[CH2:8][O:9][C:10]1[CH:11]=[CH:12][C:13]([CH2:16][CH2:17][C:18]([OH:20])=[O:19])=[CH:14][CH:15]=1To a solution (5.0 mL) of methyl 3-(4-((3-(2,6-dimethylphenoxy)benzyl)oxy)phenyl)propanoate (0.24 g, 0.62 mmol) in methanol was added 1N aqueous sodium hydroxide solution (1.2 mL), and the mixture was stirred at room temperature for 2 hrs. The reaction mixture was concentrated, and the residue was diluted with ethyl acetate, washed with 1N hydrochloric acid and water, dried, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=3/2-1/4) to give the title compound (0.15 g, yield 64%) as colorless crystals.
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