Table 3. Experimental details.

Crystal data
Chemical formula	C19H17N3O
M r	303.22
Crystal system, space group	Monoclinic, P21/c
Temperature (K)	296
a, b, c (Å)	10.5652 (7), 7.9136 (6), 20.8153 (13)
β (°)	118.408 (4)
V (Å3)	1530.77 (19)
Z	4
Radiation type	Mo Kα
μ (mm−1)	0.08
Crystal size (mm)	0.21 × 0.15 × 0.11
Data collection
Diffractometer	Bruker SMART CCD area detector
Absorption correction	Multi-scan (SADABS; Bruker, 2012 ▸)
T min, T max	0.785, 0.856
No. of measured, independent and observed [I > 2σ(I)] reflections	17211, 2664, 1087
R int	0.122
(sin θ/λ)max (Å−1)	0.595
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.040, 0.092, 0.73
No. of reflections	2664
No. of parameters	212
No. of restraints	7
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å−3)	0.14, −0.15

Computer programs: SMART and SAINT (Bruker, 2012 ▸), SHELXT (Sheldrick, 2015a ▸), SHELXL2016 (Sheldrick, 2015b ▸), ORTEP-3 for Windows and WinGX (Farrugia, 2012 ▸), Mercury (Macrae et al., 2008 ▸) and PLATON (Spek, 2009 ▸).