COVID-19(2) Vaccine(2) SARS-CoV-2(2) Interaction(2) evaluated(2) treat(1) Ritonavir(1) S1 RBD(1) researcher(1) binding affinity(1) SARS-CoV-2 entry(1) molecule(1) evaluate(1) Patient(1) compounds(1) Cell(1) therapy(1) analysed(1) was obtained(1) Protein Data Bank(1) the receptor-binding domain(1) COVID-19 pandemic(1) Potential(1) Protein(1) SARS-CoV-2 protease(1) coronavirus(1) inhibitor(1) Discovery Studio(1) inhibition(1) Contact(1)