Bruker SMART APEXII CCD diffractometer	7482 independent reflections
Radiation source: fine-focus sealed tube	6933 reflections with I > 2σ(I)
graphite	Rint = 0.019
φ and ω scans	θmax = 35.0°, θmin = 1.5°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −11→11
Tmin = 0.797, Tmax = 0.898	k = −13→14
27967 measured reflections	l = −21→21