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Figure 1 A structural unit of (1) with atom labelling scheme and 50% probability displacement ellipsoids. Symmetry codes: (i) x,-y-3/2,z-1/2; (ii) x,-y+3/2,z+1/2; (iii) −x,y-1/2,-z+3/2; (iv) −x+1,-y+2,-z+1; (v) −x+1,y-1/2,-z+1/2; (vi) −x+1,y+1/2;-z+1/2; (vii) −x,y+1/2,-z+3/2. |