Table 4. Experimental details.
| Crystal data | |
| Chemical formula | C20H15NO3 | 
| M r | 317.33 | 
| Crystal system, space group | Monoclinic, P21/n | 
| Temperature (K) | 150 | 
| a, b, c (Å) | 8.2284 (3), 13.7693 (4), 13.9230 (4) | 
| β (°) | 96.155 (1) | 
| V (Å3) | 1568.37 (9) | 
| Z | 4 | 
| Radiation type | Mo Kα | 
| μ (mm−1) | 0.09 | 
| Crystal size (mm) | 0.44 × 0.35 × 0.32 | 
| Data collection | |
| Diffractometer | Bruker D8 QUEST PHOTON 3 diffractometer | 
| Absorption correction | Numerical (SADABS; Krause et al., 2015 ▸) | 
| T min, T max | 0.93, 0.97 | 
| No. of measured, independent and observed [I > 2σ(I)] reflections | 80207, 6020, 5304 | 
| R int | 0.025 | 
| (sin θ/λ)max (Å−1) | 0.774 | 
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.046, 0.133, 1.03 | 
| No. of reflections | 6020 | 
| No. of parameters | 217 | 
| H-atom treatment | H-atom parameters constrained | 
| Δρmax, Δρmin (e Å−3) | 0.46, −0.21 |