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The title compound 5,17-diformyl-11,23-di(tert-butyl)-25,26,27,28-tetrapropoxycalix[4]arene has been synthesized by selective formylation of 5,11,17,23-tetra(tert-butyl)25,26,27,28-tetrahydroxycalix[4]arene in three steps and characterized by1H NMR and X-