Figure 4.  Energy components (kcal/mol) for the binding of remdesivir and four polyphenols to RdRp receptor. ΔEvdW, van der Waals interaction; ΔEele, electrostatic interaction in the gas phase; ΔGpol, polar solvation energy; ΔGnp, non-polar solvation energy, and ΔGbind, estimated binding affinity.