Also known as TOG, 7-thia-8-oxoguanosine, Immunosine, Immusine, Isatoribine. An antiviral and immunostimulatory agent that activates, among other things, Toll-like receptor 7 (TLR7).⁽¹⁾

Ref:

1. Lee, J.; Chuang, T.-H.; Redecke, V.; She, L.; Pitha, P. M.; Carson, D. A.; Raz, E.; Cottam, H. B., Proc. Natl Acad. Sci. USA 2003, 100, 6646-6651 and references therein.