Table 2. Experimental details.

Crystal data
Chemical formula	C23H25N3O4
M r	407.46
Crystal system, space group	Orthorhombic, P212121
Temperature (K)	173
a, b, c (Å)	9.5276 (2), 10.0030 (2), 21.9495 (7)
V (Å3)	2091.89 (9)
Z	4
Radiation type	Mo Kα
μ (mm−1)	0.09
Crystal size (mm)	0.31 × 0.17 × 0.12
Data collection
Diffractometer	Nonius KappaCCD
Absorption correction	–
No. of measured, independent and observed [I > 2σ(I)] reflections	5878, 3423, 1983
R int	0.070
(sin θ/λ)max (Å−1)	0.705
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.053, 0.106, 1.02
No. of reflections	3423
No. of parameters	273
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.19, −0.20

Computer programs: KappaCCD Server Software (Nonius, 1997 ▸), DENZO and SCALEPACK (Otwinowski & Minor, 1997 ▸), SIR2011 (Burla et al., 2012 ▸), ORTEP-3 for Windows (Farrugia, 2012 ▸), SHELXL97 (Sheldrick, 2008 ▸), PLATON (Spek, 2009 ▸) and publCIF (Westrip, 2010 ▸).