Table 3.

List of bioactive compounds with binding interaction parameters in the active site of Nsp15 endoribonuclease of the SARS-CoV-2.

S.No.	Ligand	Binding interactionwith the active site of Nsp15 endoribonuclease
		Binding energy (Kcal/mol)	H-Bonding	Hydrophobic	Charge center	π-Stacking (Parallel)	π- Stacking (Perpendicular)	π-cation (Interaction)
1	CID_14982	−8.3	His235, Ser294, Cys291, Thr341	Tyr343	His235, His250, Lys290	–	–	His235, His250, Lys290
2	CID_480775	−8.4	His250, Ser294, Tyr343, Thr341, Val292	Lys345, Tyr343, Thr341	–	Tyr343	Trp333
3	CID_503737	−8.8	Lys290, Gln245, Leu246, Leu346, Asn278	Lys290, Tyr343, Val292	Lys290, His235	–	–	Lys290, His235
4	CID_5481963	−9.2	Lys290, Leu346, Asn278, Lys345, Tyr343	Tyr343, Val292, Lys345, Phe269	–	–	–	–
5	CID_6442433	−9.0	Asp240, Glu340, Ser294	Thr341, Ser294, Val292	His235	Thr341	–	His235
6	CID_10473311	−8.3	His250, Lys290, Asn278, Gly248, Leu346, Ser294, Pro 344	Trp343, Trp333, Thr341, Lys290, Lys345	–	Trp343	–	–
7	Lopinavir	−8.3	His235, Thr341, Glu340	Thr341, Tyr343, Lys345	–	Trp333	Tyr343	–
8	Ribavirin	−6.6	His235, His250, Thr341, Gln245, Gly248, Lys290, Ser294	–	–	–	–	–