Data collection and refinement statistics^*.

*The data set was collected from one single crystal. Values in parentheses are for the highest resolution shell. †Rmerge = ∑hkl∑I |Ii(hkl) − (hkl)>|/∑hkl∑iIi(hkl), where Ii(hkl) is the intensity of the ith observation of the reflection hkl and (hkl)> is the mean intensity of reflections hkl. §Rwork = ∑(||F(obs)| − |F(calc)||)/∑|F(obs)|, where F(obs) and F(calc) are observed and calculated structure factors, respectively. ¶Rfree was calculated using 5% of data excluded from refinement.