Molecular docking of Bis-demethoxy curcumin on SARS-CoV-2 spike protein receptor binding domain (6M0J). (A) 3D structure of SARS-CoV-2 spike protein RBD bound with ACE2 protein Macromolecule. (B) Binding Interaction of Bis-demethoxy curcumin with amino acid residue of spike protein RBD of SARS-CoV-2 (PDB ID-6M0J). (C) Superimposed binding mode of Bis-demethoxy curcumin, docked with SARS-CoV-2 spike protein RBD. (D) 2D representation of the binding interaction of Bis-demethoxy curcumin with SARS-CoV-2 spike RBD.