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Figure 1
Sulfonato-calix[n]arenes. (a) Molecular structures and (b) cone (sclx4), double partial-cone (sclx6) and double cone (sclx8) conformations.

IUCrJ
Volume 6| Part 2| March 2019| Pages 238-247
ISSN: 2052-2525
https://doi.org/10.1107/S2052252519000411