Hydrogen ionophore V

2,2'-[5,11,17,23-tetra-tert-butyl-26,28-dihydroxycalix[4]arene-25,27-diylbis(oxy)]bis(N-phenylacetamide)

25-(2-aminoethoxy)-5,11,17,23-tetra-tert-butyl-26,27,28-trihydroxycalix[4]arene