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Figure 3 A larger portion of the crystal struture of (I), the formation of a hydrogen-bonded sheet built from C—H⋯π. For clarity, H atoms not involved in the hydrogen bonding have been omitted. Dashed lines indicate hydrogen bonds. [Symmetry codes: (A) −x, 1 − y, 1 − z; (B) − x, − y, 1 − z; (C) x, 1 + y, z; (D) 1 − x, + y, − z; (E) − x, 2 − y, 1 − z; (F) −1 + x, − y, + z; (G) 1 − x, − + y, − z; (H) −1 + x, − y, + z] . |