[CH2:1]([O:8][C:9]1[CH:14]=[C:13]([C:15]([CH3:18])([CH3:17])[CH3:16])[CH:12]=[C:11]([C:19]([CH3:22])([CH3:21])[CH3:20])[C:10]=1[CH2:23][CH2:24][NH2:25])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:26]1(=O)[CH2:31][CH2:30][CH2:29][CH2:28][CH2:27]1>>[CH2:1]([O:8][C:9]1[CH:14]=[C:13]([C:15]([CH3:17])([CH3:16])[CH3:18])[CH:12]=[C:11]([C:19]([CH3:22])([CH3:21])[CH3:20])[C:10]=1[CH2:23][CH2:24][NH:25][CH:26]1[CH2:31][CH2:30][CH2:29][CH2:28][CH2:27]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1The product from Step A (0.227 g) was treated with 0.070 g (0.71 mmol) of cyclohexanone according to the procedure described in Example 3. The product was purified on a silica gel flash chromatography column eluted with 5-10% isopropanol in hexane. Evaporation of the purified fractions and drying in vacuo afforded the title compound.
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