[C:1]([C:3]1[CH:4]=[C:5]([CH:22]=[CH:23][CH:24]=1)[O:6][CH2:7][CH2:8][NH:9][C:10]([C:12]1[CH:21]=[CH:20][C:15]([C:16]([O:18]C)=[O:17])=[CH:14][CH:13]=1)=[O:11])#[N:2].[OH-].[Na+]>C(O)C.C1COCC1>[C:1]([C:3]1[CH:4]=[C:5]([CH:22]=[CH:23][CH:24]=1)[O:6][CH2:7][CH2:8][NH:9][C:10]([C:12]1[CH:13]=[CH:14][C:15]([C:16]([OH:18])=[O:17])=[CH:20][CH:21]=1)=[O:11])#[N:2]310 mg (1 mmol) of methyl 4-[N-[2-(3-cyanophenoxy)ethyl]carbamoyl]benzoate was stirred in 15 ml of ethanol and 15 ml of THF. 3 ml of 1 N aqueous sodium hydroxide solution was added thereto and they were stirred at room temperature overnight. The reaction liquid was distilled under reduced pressure and then 1 N hydrochloric acid was added to the residue. After the extraction with ethyl acetate, the extract was washed with a saturated aqueous NaCl solution and then dried over anhydrous magnesium sulfate. The solvent was evaporated to obtain the title compound.
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