Bruker APEXII CCD diffractometer	3527 reflections with I > 2σ(I)
φ and ω scans	Rint = 0.054
Absorption correction: multi-scan (SADABS; Bruker, 2008)	θmax = 27.6°, θmin = 2.4°
Tmin = 0.618, Tmax = 0.681	h = −12→12
39878 measured reflections	k = −12→12
3616 independent reflections	l = −21→21