Penciclovir
Penciclovir, a synthetic acyclic guanine derivative, containing antiviral activity, functions as a Herpes Simplex Virus (HSV) DNA inhibitor, is one of the drugs tested against 2019-nCoV. High nucleoside analog concentrations of Penciclovir (EC50 = 95.96 μM, CC50 > 400 μM, SI > 4.17) [10] were needed to reduce the viral infection and could further be examined as a COVID-19 drug [14] [15].