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Previous literature data have shown that the benzoate ligands in the axial positions of Pt(IV) derivatives of cisplatin and oxaliplatin confer pharmacological activity at nanomolar concentration, most likely because of the increased intracellular accumulation caused by passive diffusion through the cell membrane. [17,18] Complex 3 was synthesized by reacting complex 1 with benzoyl chloride in the presence of pyridine (Scheme 1).
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