Phenylacetic acid (99.0%), zinc chloride (98.0%), phthalimide (98.0%), zinc phenylacetate (98.0%), α, ω-amino-terminated polyethylene glycol (PEG, Mw = 2 kDa, 99.5%), chloro (1,5-cyclooctadiene) iridium(I) dimer ([Ir(COD)2Cl2]2, 95.0%) and chlorosulphonic acid (97.0%)were obtained from J & K Chemical Ltd. Tirapazamine (TPZ), AQ4N, PR104, TH302 and solvents were purchased from Sigma-Aldrich Chemical Co. All the commercially available reagents were used as received without any further purification. The cell culture products were purchased from Thermo Fisher Scientific unless otherwise stated.
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