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In the crystal structure of the title compound, C 25 H 30 N 2 O 4 , the steric size of the  tert -butyl group causes the 3,5-dimethyl­phenyl ring to adopt a  transoid  geometry with respect to the N—C(O) bond. The six-membered heterocyclic ring is disordered over two sites, with occupancies of 0.553 (4) and 0.447 (4). Intra­molecular C—H⋯O inter­actions are present. In the crystal, mol­ecules are linked by inter­molecular N—H⋯O and C—H⋯O hydrogen bonds.

N′-tert-Butyl-N′-(3,5-dimethylbenzoyl)-2,2-dimethyl-4-oxochroman-6-carbohydrazide