Bruker APEXII CCD diffractometer	3621 independent reflections
Radiation source: fine-focus sealed tube	3543 reflections with I > 2σ(I)
graphite	Rint = 0.032
φ and ω scans	θmax = 70.2°, θmin = 2.4°
Absorption correction: multi-scan (SADABS; Sheldrick, 2004)	h = −23→23
Tmin = 0.622, Tmax = 0.804	k = −10→12
31213 measured reflections	l = −12→12