Bruker APEXII CCD diffractometer	1961 independent reflections
Radiation source: fine-focus sealed tube	1248 reflections with I > 2σ(I)
graphite	Rint = 0.024
φ and ω scans	θmax = 27.1°, θmin = 3.2°
Absorption correction: multi-scan (SADABS; Bruker, 2007)	h = −10→10
Tmin = 0.671, Tmax = 0.746	k = −18→17
8725 measured reflections	l = −20→15