Bruker SMART CCD area-detector diffractometer	3453 independent reflections
Radiation source: fine-focus sealed tube	3005 reflections with I > 2σ(I)
graphite	Rint = 0.022
φ and ω scans	θmax = 25.1°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −9→10
Tmin = 0.907, Tmax = 0.945	k = −16→13
10361 measured reflections	l = −20→19