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In the title compound, C 21 H 24 BrNO 4 , the dihedral angle between the heterocyclic ring and the pendant aromatic ring is 80.20 (13)°. The hexahydroquinone [ i.e.  the one with the C=O group] ring adopts a sofa conformation. An intra­molecular O—H⋯O hydrogen bond generates an  S (6) ring motif. The ethyl group is disordered over two sets of sites with a refined site occupancy ratio of 0.633 (10):0.366 (10). In the crystal, mol­ecules are linked by N—H⋯O inter­actions, forming chains parallel to [101]. There are no significant C—H⋯π or π–π inter­actions in the crystal structure.

Ethyl 4-(5-bromo-2-hydroxyphenyl)-2,7,7-trimethyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate