COVID-19(2) FIVE(1) in silico(1) Isatin hydrazine(1) classical(1) Protein(1) the SARS-CoV-2(1) Selection(1) polymerase chain reaction(1) Ligand(1) Drug design and development(1) in vivo experiment(1) ACE2(1) Granular material(1) supplementary material(1) Glide(1) docking(1) SARS-CoV-2 spike(1) Computational docking study(1) viral entry(1) suggested(1) SARS-CoV-2 spike protein(1) SARS-CoV-2 virus(1) binding(1) pet(1) Kabasura kudineer(1) Breakthrough curve(1) Siddha(1) domain(1) Favipiravir(1)