[CH3:1][O:2][C:3]1[C:4]([CH2:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[C:5]([C:11]2[O:12]CC(C)(C)N=2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C[O:27]C1C=C(CC#N)C=C(CCC)C=1OC>>[CH3:1][O:2][C:3]1[C:4]([CH2:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[C:5]([CH:6]=[CH:7][C:8]=1[O:9][CH3:10])[C:11]([OH:12])=[O:27]Similarly prepared from the corresponding product of step (a) or (b) were:
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