Fig. 3. SEC traces (THF, 30 °C) of the products of the ring-opening reaction of 1a with A₁ (A₁/1a = 1/100) at different runs in Table 1. PCL was prepared by DPP-catalyzed ROP of CL in toluene (entry 3 in Table S1†). Molecular weights were calibrated by polystyrene standards.