HTR1A and prostate cancer: Compound AZ07 (IC50 = 5.74 ± 1.02 μM) showed the highest absolute cytotoxicity to PC-3 prostate cancer cells, and the 5-HT1A receptor agonist S14506 (IC50 = 4.27 ± 0.41 μM) had the highest cytotoxicity to neuroblastoma SH-SY5Y cells.