[CH2:1]([O:11][C:12]1[CH:13]=[C:14]([CH:19]=[CH:20][CH:21]=1)[C:15]([O:17]C)=[O:16])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH3:10].[OH-].[Na+].Cl>CO.O>[CH2:1]([O:11][C:12]1[CH:13]=[C:14]([CH:19]=[CH:20][CH:21]=1)[C:15]([OH:17])=[O:16])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH3:10]A solution of methyl 3-decyloxybenzoate (9.64 g, 0.033 mol) and sodium hydroxide (6.60 g, 0.165 mol) in methanol (150 ml) and water (15 ml) was heated under reflux for 2 h. The reaction mixture was then allowed to cool, followed by addition of dilute HCl (100 ml). The crude product was filtered off, washed with water and then dried in vacuo. The material was recrystallised to yield colourless crystals.
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