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Docking poses of caffeic acid derivatives with COVID-19 virus fusion protein S2 subunit (A) Hydrogen bonding interactions of khaınaosıde B, chicoric acid, vitexfolin A, 6-O-Caffeoylarbutin, and calceolarioside B with amino acid residues of fusion protein S2 subunit (B) 2D view of interaction types of khaınaosıde B, chicoric acid, vitexfolin A, 6-O-Caffeoylarbutin, and calceolarioside B with surrounding amino acids of COVID-19 virus fusion protein S2 subunit.
