Abstract
The title compound, C(21)H(23)N(3)O(4), adopts an E configuration about the central C=N double bond and the pyrazolone ring is almost planar, with a maximum deviation of 0.042 (1) angstrom. The central pyrazolone ring makes dihedral angles of 51.96 (5) and 3.82 (5)degrees with the attached phenyl and the trimethoxy-substituted benzene rings, respectively. The dihedral angle between the phenyl ring and the trimethoxy-substituted benzene ring is 50.19 (5)degrees and an intramolecular C-H center dot center dot center dot O hydrogen bond generates an S(6) ring motif. The crystal structure is stabilized by intermolecular C-H center dot center dot center dot O and C-H center dot center dot center dot N hydrogen bonds.