Amino acids Angiotensin-converting enzyme 2 Binding energy COVID-19 Cathepsin L Cells Coronavirus Coronavirus disease 2019 Coronaviruses Cytology Flavonoids Host cell target Host cell targets Host cells Human cells Molecular dynamics Molecular dynamics simulation Phytocompound Phytocompounds SARS-CoV-2 Severe acute respiratory syndrome coronavirus Severe acute respiratory syndrome coronavirus 2