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In the title compound, C19H21BrN2O2S, the fused pyrrolidine rings adopt envelope conformations. The mol­ecular packing is stabilized by weak inter­molecular C—H...O inter­actions and van der Waals forces.

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The title compound, C25H31NO2, crystallizes with two molecules in the asymmetric unit. In both mol­ecules, the central dihydropyridine ring adopts a flattened boat conformation. In mol­ecule A, the outer rings adopt sofa conformations, whereas in mol­ecule B, one of the outer rings is disordered and the other ring adopts a sofa conformation. In the crystal structure, C—H...O inter­actions link the mol­ecules to form a tape that runs along the b axis.
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