[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH:8]=[CH:9][C:10]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)=O.[S:18]1[C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=2[N:20]=[C:19]1[NH:27][NH2:28]>>[S:18]1[C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=2[N:20]=[C:19]1[N:27]1[CH:10]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH2:9][C:8]([C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=2[OH:1])=[N:28]1Example 4 is prepared using 2-hydroxychalcone and benzothiazol-2-yl-hydrazine following the procedure described for Example 1.
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