Bruker APEXII CCD diffractometer	793 independent reflections
Radiation source: fine-focus sealed tube	694 reflections with I > 2s(I)
graphite	Rint = 0.028
φ and ω scans	θmax = 28.3°, θmin = 3.8°
Absorption correction: multi-scan (AX-Scale; Bruker, 2008)	h = −23→25
Tmin = 0.757, Tmax = 0.912	k = −7→7
3067 measured reflections	l = −6→7