Pyridostatin (RR82) trihydrochloride is a G-quadruplex (G4) inducer/stabilizer with a Kd of 490 nM. Pyridostatin trihydrochloride also acts as an inhibitor of Zika virus (ZIKV) NS2B-NS3 protease, with an IC50 of 11.0 µM. Pyridostatin trihydrochloride interacts with G-quadruplex structures, regulates the expression of SRC and SUB1, and induces replication- and transcription-dependent DNA damage, growth arrest, and genomic instability. Pyridostatin trihydrochloride exhibits antiproliferative and antiviral activities. Pyridostatin trihydrochloride can be used in studies related to breast cancer, cervical cancer, and Zika virus infection[1][2][3][4].