Figure 2
A view of part of a helix of molecules in the title structure linked by hydrogen bonding. The helices run parallel to the crystallographic a axis. [Symmetry codes: (i) x − ½, − y, 2 − z; (ii) x − 1, y, z; (iii) x + ½, − y, 2 − z; (iv) x + 1, y, z.] |