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Figure 4
Packing of the molecules in the crystals of (a) (I), fragment of the unit cell (0,1/2c), (b) (II), and (c) (III), all along the [001] direction. Heart-shaped motifs are marked in violet.

IUCrJ
Volume 6| Part 2| March 2019| Pages 226-237
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518017037