O[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]2[O:12][C:13]3[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=3[C:4]=2[N:3]=1.[Cl:19]C1C=C2C(C3OC4C=CC=CC=4C=3N=C2O)=CC=1>>[Cl:19][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]2[O:12][C:13]3[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=3[C:4]=2[N:3]=1The procedure was similar to step S19C, while the starting material was 22B in stead of 19B.
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