Omran, et al.. N,n,n-triethylethanaminium 5,11,17,23-tetra-tert-butyl-25-cyanomethoxy-26,28-dihydroxy-27-oxido-2,8,14,20-tetrathiacalix[4]arene: A Molecular Salt. International Union of Crystallography (IUCr), Jan. 2016, doi:10.1107/s2414314616001152.