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Schematic representation that recapitulates the receptor molecular environment and the water (W) networks with which the naphthyridine scaffold ligands interact when coordinating the Mg2+ ions. The scheme summarizes interactions by their locations with respect to the metal coordination plane of the naphthyridine scaffold (above, in-plane, or below). For clarity, the two water molecules coordinating the Mg2+ ions from above are not shown.
