[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6](/[CH:9]=[CH:10]/[C:11](OCC)=[O:12])=[CH:5][C:4]=1[O:16][CH2:17][O:18][CH3:19].[OH-].[Na+]>C1(C)C=CC=CC=1.CCCCCC>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6](/[CH:9]=[CH:10]/[CH2:11][OH:12])=[CH:5][C:4]=1[O:16][CH2:17][O:18][CH3:19]A solution of the compound (4.54 g, 17.0 mmol) of Example 9-2 in toluene (60 ml) was stirred at −78° C., and thereto was dropped diisobutylalminumhydride (1.0M in hexane: 35.8 ml, 35.8 mmol). The mixture was stirred for 1.5 hours at −78° C., followed by addition of an aqueous 2N sodium hydroxide solution. The precipitate was filtered off and the filtrate was extracted with ethyl acetate. The organic layer was washed with water and an aqueous sodium chloride solution in the order, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure to give the subject compound (3.65 g, 95.7%).
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