thiazolidinedione ring in the molecule were tested for in vitrocytotoxicactivity in a panel of human cancer cell lines namely, prostate cancer cells PC-3, breast carcinoma cells MDA-MB-231, and fibrosarcoma cells HT-1080. Some of the target compounds of the A-series where the thiazolidinedione ring is terminal, displayed cytotoxicactivity in the low micromolar range in the cell lines tested. Target