[NH2:1][C:2]1[S:3][C:4]([CH2:12][CH3:13])=[CH:5][C:6]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8].[Cl:14][C:15]1[C:16](F)=[C:17]([N+:21]([O-:23])=[O:22])[CH:18]=[CH:19][CH:20]=1>CCO>[Cl:14][C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([N+:21]([O-:23])=[O:22])[C:16]=1[NH:1][C:2]1[S:3][C:4]([CH2:12][CH3:13])=[CH:5][C:6]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8]Ethyl 2-amino-5-ethyl-thiophene-3-carboxylate and 3-chloro-2-fluoronitrobenzene, m.p. 67°-70° C. (EtOH).
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