ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.69, 2013 (ESCI)
The title compound, C21H21N3O2, adopts a J-shaped conformation which appears to be at least partially directed by a weak intramolecular C-H center dot center dot center dot N hydrogen bond. In the crystal, molecules are linked by N-H center dot center dot center dot O hydrogen bonds into R-2(2)(8) and R-2(2)(14) cyclic dimers, which form a chain running parallel to the b axis.