[H-].[Al+3].[Li+].[H-].[H-].[H-].O1CCCC1.C([O:14][C:15]([CH2:17][NH:18][CH:19]([C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[CH3:27])[CH3:20])=O)C>O>[OH:14][CH2:15][CH2:17][NH:18][CH:19]([C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[CH3:27])[CH3:20]To a mixture of 3.8 g of lithium aluminium hydride (0.1M) and 150 ml of tetrahydrofuran, 23.3 g of the compound (0.105M) prepared in Step 2 above was dropwise added at room temperature and stirred for 30 minutes. The resultant was added with water and solids produced were filtered. The filtrate was dried over anhydrous sodium sulfate and concentrated under a reduced pressure, to give 13.8 g of the title compound.
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