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Figure 4
Schematic representation of the crystal packing of the (a) GP form α, (b) GP form β, (c) GP form γ, (d) GPH form I and (e) GPH form II. Hydrogen-bonding interactions are in green, selected hydrogen atoms have been omitted for clarity.

IUCrJ
Volume 6| Part 4| July 2019| Pages 630-634
ISSN: 2052-2525
https://doi.org/10.1107/S2052252519004755