Fig. 1. (A) Synthetic scheme of GP1 and GP2: (i) TBTU (1 equiv.), triethylamine (1 equiv.), 2 (1.5 equiv.), DMSO, 45 °C, 12 h, 44%; (ii) TBTU (1 equiv.), triethylamine (1 equiv.), 3 (1.5 equiv.), DMSO, 45 °C, 12 h, 56%. (B) Structures of cisplatin, carboplatin, and the corresponding Pt(iv) complexes 2 and 3.