Table 2. Experimental details.

Crystal data
Chemical formula	C26H22O6
M r	430.43
Crystal system, space group	Monoclinic, P21/c
Temperature (K)	100
a, b, c (Å)	6.1631 (6), 19.253 (2), 18.0743 (19)
β (°)	96.830 (1)
V (Å3)	2129.5 (4)
Z	4
Radiation type	Mo Kα
μ (mm−1)	0.10
Crystal size (mm)	0.4 × 0.12 × 0.06
Data collection
Diffractometer	Bruker SMART APEX CCD area detector
Absorption correction	Multi-scan (SADABS; Bruker, 2004 ▸)
T min, T max	0.964, 1.00
No. of measured, independent and observed [I > 2σ(I)] reflections	19788, 5132, 4358
R int	0.021
(sin θ/λ)max (Å−1)	0.667
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.048, 0.125, 1.02
No. of reflections	5132
No. of parameters	292
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.42, −0.23

Computer programs: SMART and SAINT (Bruker, 2006 ▸), SHELXS (Sheldrick, 2008 ▸), SHELXL (Sheldrick, 2015 ▸) and OLEX2 (Dolomanov et al., 2009 ▸).