FOLH1 and cancer: The cytotoxicity detection also revealed that most of the PSMA hydrolysate CPT-D-GLn and the intermediate CPT-B-Ln exhibited antiproliferative activities against all tested cancer cells, but their cytotoxic selectivity against the PSMA-expressing and the non-PSMA-expressing cancer cells was lower than the prodrugs CPT-HT-J-ZLn.