title: N'-tert-Butyl-N'-(3,5-dimethyl-benzo-yl)-2,2-dimethyl-4-oxochroman-6-carbo-hydrazide.
abstract: 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-dimethyl-phenyl 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). Intra-molecular C-H⋯O inter-actions are present. In the crystal, mol-ecules are linked by inter-molecular N-H⋯O and C-H⋯O hydrogen bonds.
authors.affiliation: School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China.
authors.forename: Zhongzhen
authors.initials: Z
authors.lastname: Zhou
authors.forename: Wenwei
authors.initials: W
authors.lastname: You
authors.forename: Zhongkun
authors.initials: Z
authors.lastname: Tang
authors.forename: Peiliang
authors.initials: P
authors.lastname: Zhao