C([O:3][C:4](=[O:44])[CH2:5][CH2:6][CH2:7][O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15](=[O:17])[CH3:16])=[C:11]([O:18][CH2:19][CH2:20][CH2:21][O:22][CH2:23][CH2:24][CH2:25][O:26][C:27]2[C:32]([Cl:33])=[CH:31][C:30]([C:34](=[O:36])[CH3:35])=[C:29]([OH:37])[C:28]=2[CH2:38][CH2:39][CH3:40])[C:10]=1[CH2:41][CH2:42][CH3:43])C>[OH-].[Na+].CO>[C:15]([C:12]1[CH:13]=[CH:14][C:9]([O:8][CH2:7][CH2:6][CH2:5][C:4]([OH:44])=[O:3])=[C:10]([CH2:41][CH2:42][CH3:43])[C:11]=1[O:18][CH2:19][CH2:20][CH2:21][O:22][CH2:23][CH2:24][CH2:25][O:26][C:27]1[C:32]([Cl:33])=[CH:31][C:30]([C:34](=[O:36])[CH3:35])=[C:29]([OH:37])[C:28]=1[CH2:38][CH2:39][CH3:40])(=[O:17])[CH3:16]A solution of 0.506 g of 4-[4-acetyl-3-[3-[3-(4-acetyl-6-chloro-3-hydroxy-2-propylphenoxy)propoxy]propoxy]-2-propylphenoxy]butanoic acid ethyl ester in 4.0 ml of 1.0N sodium hydroxide and 20 ml of methanol was stirred at reflux for 2 hours. The methanol was removed in vacuo and the residue was acidified. The product was extracted with ethyl acetate and the dried (magnesium sulfate) extract was concentrated in vacuo to give 0.461 g (95% yield) of 4-[4-acetyl-3-[3-[3-(4-acetyl-6-chloro-3-hydroxy-2-propylphenoxy)propoxy]propoxy]-2-propylphenoxy]butanoic acid as an oil.
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