Synthesis and Biological Activities of Novel s-Triazine Bridged Dinucleoside Analogues. -A series of novel s-triazine linked "triple headed" dinucleoside analogues is synthesized by stepwise substitution of unprotected nucleosides with cyanuric chloride. Some of these compounds, such as compound (IVa) show good in vitro inhibitory activity against human cervical cancer cells, but none of them exhibits anti-HIV-RT activity. -(SHEN, F.; LI*, X.; ZHANG, X.; QIN, Z.; YIN, Q.; CHEN, H.; ZHANG, J.; Chin.