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Figure 8
A partial packing diagram of (III)[link], showing the 21 helix running along the b-axis direction formed by O—H⋯O and N—H⋯O hydrogen bonds (black dashed lines). The C—H⋯O and ππ inter­actions observed in the chain are indicated by black and blue dashed lines, respectively. Cg1 and Cg3 are the centroids of the C1–C6 and C11–C16 rings, respectively. H atoms not involved in the hydrogen bonds have been omitted. [Symmetry codes: (i) −x + [{1\over 2}], y + [{1\over 2}], −z + [{1\over 2}]; (ii) x, y + 1, z.]

ISSN: 2056-9890
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