Nonius Kappa CCD diffractometer	5119 reflections with I > 2σ(I)
θ/2θ scans	Rint = 0.031
Absorption correction: ψ scan (North et al., 1968)	θmax = 31.1°, θmin = 3.0°
Tmin = 0.856, Tmax = 0.919	h = −22→22
29723 measured reflections	k = −12→11
6435 independent reflections	l = −21→22