Bruker SMART CCD diffractometer	1999 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	Rint = 0.037
graphite	θmax = 27.5°, θmin = 3.1°
φ and ω scans	h = −17→17
12608 measured reflections	k = −10→11
3038 independent reflections	l = −14→14