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Figure 2
In the experimental crystal structure of (I)[link] (left) the ethyl group of the Ile residue of mol­ecule B is rotated to relieve a short distance between H91B and F2C. If the C7B—C8B—C9B—C10B torsion angle had been exactly 180°, this distance would have been too short (right). The terminal methyl group, with C10B as a sphere, is not involved in any short contacts.

Journal logoCRYSTALLOGRAPHIC
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ISSN: 2056-9890
Volume 72| Part 5| May 2016| Pages 635-638
doi:10.1107/S2056989016005302
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