Table 2. Experimental details.

Crystal data
Chemical formula	C19H16N4O
M r	316.36
Crystal system, space group	Monoclinic, P21/n
Temperature (K)	150
a, b, c (Å)	6.5227 (3), 7.8979 (4), 30.7774 (15)
β (°)	95.389 (2)
V (Å3)	1578.51 (13)
Z	4
Radiation type	Cu Kα
μ (mm−1)	0.69
Crystal size (mm)	0.30 × 0.24 × 0.04
Data collection
Diffractometer	Bruker D8 VENTURE PHOTON 100 CMOS
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 ▸)
T min, T max	0.85, 0.98
No. of measured, independent and observed [I > 2σ(I)] reflections	11542, 3069, 2613
R int	0.035
(sin θ/λ)max (Å−1)	0.617
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.039, 0.091, 1.06
No. of reflections	3069
No. of parameters	282
H-atom treatment	All H-atom parameters refined
Δρmax, Δρmin (e Å−3)	0.19, −0.18

Computer programs: APEX3 and SAINT (Bruker, 2016 ▸), SAINT (Bruker, 2016 ▸), SHELXT (Sheldrick, 2015a ▸), SHELXL2018 (Sheldrick, 2015b ▸), DIAMOND (Brandenburg & Putz, 2012 ▸) and SHELXTL (Sheldrick, 2008 ▸).