Telomeres, an important tumor chromosomal target, are enlogated by overexpressed telomerase in most tumor cell. Researchers have attempted to design and synthesize G-4 ligands to stabilize telomeric G-quadruplex aiming for telomerase inhibition as a potential anti-tumor route. Taking advantages of the strong binding of BMVC with telomeres as well as its fluorescent sensing, we decided toreplace one of the pyridinium ring with a photoactive thymine in order to damage the telomere G-quardruplex. The reported simulation result indicates that one pyridinium arm of BMVC showed tightly