[CH2:1]([C:6]1[CH:11]=[CH:10][C:9]([O:12][C:13](=[O:28])[C:14]2[CH:19]=[CH:18][C:17]([O:20]CC3C=CC=CC=3)=[CH:16][CH:15]=2)=[CH:8][CH:7]=1)[CH2:2][CH2:3][CH2:4][CH3:5].C1CCCCC1>[OH-].[OH-].[Pd+2].C(O)C>[CH2:1]([C:6]1[CH:11]=[CH:10][C:9]([O:12][C:13](=[O:28])[C:14]2[CH:15]=[CH:16][C:17]([OH:20])=[CH:18][CH:19]=2)=[CH:8][CH:7]=1)[CH2:2][CH2:3][CH2:4][CH3:5]15.6 g (41.5 mmol) of 4-benzyloxy-benzoic acid 4-pentyl-phenyl ester, 25 mL of cyclohexane and 0.78 g of palladium hydroxide/carbon were added to 100 mL of dehydrated ethanol and refluxed for 10 hours in the presence of argon. The resulting reaction mixture was filtered and the filtrate was concentrated. The residue was recrystallized from toluene to obtain 11.0 g of a white solid.
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