[NH2:1][N:2]1[C:6](=[O:7])[C:5]2=[CH:8][CH:9]=[CH:10][CH:11]=[C:4]2[C:3]1=[O:12].O1CCCC1.[CH3:18][C:19]([CH3:29])([CH2:27][CH3:28])[CH:20]([CH2:23][C:24](=O)[CH3:25])[CH:21]=O>Cl.C(OCC)(=O)C>[CH3:18][C:19]([C:20]1[CH:23]=[C:24]([CH3:25])[N:1]([N:2]2[C:3](=[O:12])[C:4]3[C:5](=[CH:8][CH:9]=[CH:10][CH:11]=3)[C:6]2=[O:7])[CH:21]=1)([CH3:29])[CH2:27][CH3:28]N-aminophthalimide (476 mg) and 5N hydrochloric acid (5 drops) were added to the tetrahydrofuran solution (20 mL) of the compound prepared in Example 54 (1 g). The reaction mixture was stirred for 20 minutes under argon gas atmosphere. Ethyl acetate (100 mL) was added to the reaction mixture. The reaction mixture was washed by a saturated aqueous solution of sodium bicarbonate and a saturated aqueous solution of sodium chloride. The organic layer was dried with anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by column chromatography on silica gel (Yamazen corporation, high flash 2 L, n-hexane→ethyl acetate/n-hexane=1/4) to obtain the title compound (675 mg) having the following physical data.
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