COVID-19(7) coronavirus(4) SARS-CoV-2(4) OTC(3) Formula(3) Against(3) Bioavailability(2) Research(2) silibinin(2) expression(2) Invasion(2) prolonged administration(2) Mortality(2) subject(2) isomer(2) therapy(2) Particular(2) molecular mechanism(2) cells(2) Effect(2) molecular(2) Signaling(2) Cell(2) biochemical(2) inhibiting(2) anticancer(2) mitochondrial membrane(2) Toxicity(2) Migration(2) professional(2)