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Figure 2 Cell contents view (Mercury; Macrae et al., 2006). For clarity only a limited set of atoms are labelled. Hydrogen bonds are shown as rippled lines (purple) with carbon, nitrogen & boron atoms gray, blue & pink respectively. Symmetry codes: (i) 1 − x, + y,1/2 − z (ii) 1 − x,1 − y,1 − z (see Table 2). |