Table 2. Experimental details.
| Crystal data | |
| Chemical formula | C11H14N2O4 |
| M r | 238.24 |
| Crystal system, space group | Monoclinic, P21/c |
| Temperature (K) | 173 |
| a, b, c (Å) | 13.9490 (9), 4.9891 (3), 17.3647 (11) |
| β (°) | 105.693 (4) |
| V (Å3) | 1163.41 (13) |
| Z | 4 |
| Radiation type | Mo Kα |
| μ (mm−1) | 0.11 |
| Crystal size (mm) | 0.2 × 0.15 × 0.08 |
| Data collection | |
| Diffractometer | Bruker PHOTON-100 CMOS |
| Absorption correction | Multi-scan (SADABS; Krause et al., 2015 ▸) |
| T min, T max | 0.769, 0.862 |
| No. of measured, independent and observed [I > 2σ(I)] reflections | 18736, 2458, 1889 |
| R int | 0.051 |
| (sin θ/λ)max (Å−1) | 0.632 |
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.042, 0.103, 1.03 |
| No. of reflections | 2458 |
| No. of parameters | 163 |
| H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
| Δρmax, Δρmin (e Å−3) | 0.21, −0.19 |