S. No. Formulation Cytotoxicity (IC50 µg/ml) % Cell viability 1 Lomustine 32 ± 1.6 28 ± 0.98 2 PD1 17 ± 0.92 21 ± 1.3 3 PD4 19 ± 1.1 26 ± 0.86 4 PD13 13 ± 1.2 18 ± 0.71

Table 4: Cytotoxic activity of lomustine and nanoparticles of batch PD1, PD4 and PD13 against L132 cell line at 24 h.