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Chemical structures of several major ECA derivatives with anticancer potential. (A) Structure of ECA derivatives containing ester, triazole, glucosamine, oxadiazole, thiazole, sulfonamide. (B) Structure of ECA derivatives containing amide. (C) Structure of ECA derivatives of transition metal complexes, such as platinum (Pt), ruthenium (Ru), and osmium (Os) complexes.
