Chemical compounds designed to bind and recognize negatively charged ions in a selective manner.
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N1,N3-di(pyridin-4-yl)benzene-1,3-bis(carbothioamide)
2‐[2‐(2‐methoxyethoxy)ethoxy]ethyl 3,5‐dinitrobenzoate
5,11,17,23-tetra-tert-butyl-25-hydroxy-27-[(ethoxycarbonyl)-methoxy]-26,28-bis[N-(4'-nitrophenyl)aminocarbonylmethoxy]thiacalix[4]arene