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The crystal structure of the title compound, C16H20BrNO3, contains three chiral centers in the configuration 1R,2S,6R. The cyclo­hexane ring is in a chair conformation. In the crystal, mol­ecules are linked by weak C—H...O inter­actions, forming chains along the a-axis direction.

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The title compound, C14H14BrNO4, contains a tricyclic ring system including three contiguous stereocenters all of which exhibit an R configuration. The cyclo­hexa­none ring adopts a chair conformation. The central oxane ring assumes a strained envelope conformation, with five of the ring atoms being nearly coplanar with the bromo­phenyl group and with the C atom adjacent to the O atom and fused with the cyclo­hexa­none ring as the flap. In the crystal, mol­ecules are linked into a three-dimensional network by C—H...O inter­actions.
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