Potassium Carbonate → 2-(3,4-Dimethoxyphenyl)-4-(2,6-difluoro-4-methoxybenzyl)-2H-1,2,4-benzothiadiazin-3(4H)-one 1,1-dioxide

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[C:1]([O-:4])([O-])=O.[K+].[K+].FC1C=[C:14]([O:16]C)C=C(F)C=1CBr.[CH3:19][O:20][C:21]1[C:26](C)=[CH:25][C:24]([N:28]2[C:33](=[O:34])[N:32]([CH2:35][C:36]3[C:41]([F:42])=[CH:40][C:39](F)=[CH:38][C:37]=3[F:44])[C:31]3[CH:45]=[CH:46][CH:47]=[CH:48][C:30]=3[S:29]2(=[O:50])=[O:49])=[CH:23][C:22]=1C>CN(C=O)C>[CH3:14][O:16][C:22]1[CH:23]=[C:24]([N:28]2[C:33](=[O:34])[N:32]([CH2:35][C:36]3[C:37]([F:44])=[CH:38][C:39]([O:4][CH3:1])=[CH:40][C:41]=3[F:42])[C:31]3[CH:45]=[CH:46][CH:47]=[CH:48][C:30]=3[S:29]2(=[O:49])=[O:50])[CH:25]=[CH:26][C:21]=1[O:20][CH3:19]