Table 3. Experimental details.

Crystal data
Chemical formula	C14H12N2O4
M r	272.26
Crystal system, space group	Monoclinic, P21/n
Temperature (K)	296
a, b, c (Å)	6.0052 (4), 7.8206 (5), 26.2985 (19)
β (°)	90.303 (5)
V (Å3)	1235.07 (14)
Z	4
Radiation type	Mo Kα
μ (mm−1)	0.11
Crystal size (mm)	0.57 × 0.43 × 0.19
Data collection
Diffractometer	Stoe IPDS 2
Absorption correction	Integration (X-RED32; Stoe & Cie, 2002 ▸)
T min, T max	0.946, 0.981
No. of measured, independent and observed [I > 2σ(I)] reflections	8536, 3300, 2436
R int	0.028
(sin θ/λ)max (Å−1)	0.686
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.041, 0.121, 1.08
No. of reflections	3300
No. of parameters	183
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.15, −0.19

Computer programs: X-AREA and X-RED (Stoe & Cie, 2002 ▸), SHELXT2017 (Sheldrick, 2015a ▸), WinGX (Farrugia, 2012 ▸), SHELXL2018 (Sheldrick, 2015b ▸), PLATON (Spek, 2009 ▸) and publCIF (Westrip, 2010 ▸).