Table 2. Experimental details.
| Crystal data | |
| Chemical formula | C9H10N2O4 |
| M r | 210.19 |
| Crystal system, space group | Monoclinic, P21/n |
| Temperature (K) | 90 |
| a, b, c (Å) | 14.8713 (7), 3.9563 (2), 17.2057 (9) |
| β (°) | 114.051 (3) |
| V (Å3) | 924.42 (8) |
| Z | 4 |
| Radiation type | Cu Kα |
| μ (mm−1) | 1.03 |
| Crystal size (mm) | 0.42 × 0.06 × 0.01 |
| Data collection | |
| Diffractometer | Bruker Kappa APEXII DUO CCD |
| Absorption correction | Multi-scan (SADABS; Krause et al., 2015 ▸) |
| T min, T max | 0.692, 0.990 |
| No. of measured, independent and observed [I > 2σ(I)] reflections | 11516, 1638, 1211 |
| R int | 0.122 |
| (sin θ/λ)max (Å−1) | 0.595 |
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.071, 0.203, 1.09 |
| No. of reflections | 1638 |
| No. of parameters | 141 |
| H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
| Δρmax, Δρmin (e Å−3) | 0.24, −0.27 |