Cytotoxicity profiles of Pt(IV) prodrugs: (a) Table of IC50 values of 4a-e and 7 measured in A549, A2780, and A2780CP70 cell lines; (b) Calcein AM/ethidium homodimer-1 cell viability assay, details of which can be found in the main text and Supporting Information (white scale bar, 20 μm; blue scale bar, 200 μm).