[OH:1][C:2]1[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][C:3]=1[C:4]([CH2:6][CH2:7][C:8]([OH:10])=[O:9])=[O:5].[CH3:17]O.Cl>>[OH:1][C:2]1[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][C:3]=1[C:4]([CH2:6][CH2:7][C:8]([O:10][CH3:17])=[O:9])=[O:5]3-(2-Hydroxy-5-methoxybenzoyl)propionic acid was esterified with methanol-hydrogen chloride, in a similar manner to the procedure described in Example 1 (i), to give methyl 3-(2-hydroxy-5-methoxybenzoyl)propionate as an oil.
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