Table 3. Cytotoxic Activity of Newly Synthesized G4 Binders in Human U2OS and HeLa Cell Lines after 1 and 24 h of Treatment Followed by 48 h of Recovery in a Drug-Free Medium^a.

	IC50 (μM)
	U2OS cell line		HeLa cell line
	1 h of treatment	24 h of treatment	1 h of treatment	24 h of treatment
compound 1	>100	>50	>100	>50
compound 15	12.51 ± 1.12	2.06 ± 1.23	3.94 ± 1.17	0.75 ± 1.19

^aConcentrations killing 50% of cells (IC₅₀) are shown as the mean ± SE of two independent experiments performed in triplicate.