Figure 2 The crystal structure showing C-H...N and C-H...O hydrogen bonds (dashed lines); H atoms not involved in hydrogen bonding have been omitted for clarity. Symmetry codes: i - x, - [{1\over 2}] + y, [{1\over 2}] - z; ii 1 - x, [{1\over 2}] + y, [{1\over 2}] - z.  [article HTML]