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Single-point screening of receptors 1–10 (10 μM) tested on a collection of different cancer cell lines, from left to right, GLC4, HT29, DLD1, HN4, CAL27, and SW620; (a) 24-h cell viability of cell exposure to ureas 1–5; (b) 24-h cell viability of cell exposure to thioureas 6–10.
