Synthesis of DCPT Photosensitizer

CPT was procured from Dalian Meilun Biology Technology Co., Ltd (Liaoning, China) and used to synthesize DCPT as per our previous report without any modifications [18 (link), 22 (link)]. Phenylalanine (Phe), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC), N-ε-Cbz-L-lysine, and 1-hydroxy-2,5-pyrrolidinedione (NHS) were bought from GL Biochem Ltd (Shanghai, China). Ce6 was provided by Frontier Scientific (Utah, USA). Dimethyl sulfoxide (DMSO) was purchased from Aladdin (Shanghai, China). N, N-dimethylformamide (DMF) was purchased from Damao (Tianjin, China). Hydrogen bromide in acetic acid (33 wt%) and bis(trichloromethyl) carbonate were supplied by J & K Scientific Ltd (Beijing, China). Thiazolyl blue tetrazolium bromide (MTT) was purchased from Amresco (Solon, Ohio, USA). PEG₆₀₀₀ were obtained from JenKem Technology Company (Beijing, China). DAPI were purchased from Beyotime Biotechnology (Jiangsu, China).