| Compounds | Affinity (kcal/mol) | H-bond | Receptor interactions |
| 4 | −6.2 | Asp-73 | Val-43, Val-71, Ile-78, Ala-47 | 5 | −6.2 | Asp-73, Thr-165, Gly-77 | Ile-94, Ile-78 | 6 | −6.4 | Gly-77, Thr-165 | Asp-73, Ile-94, Ile-78, Ala-47 | 7 | −6.3 | Asn-46, Thr-165, Gly-77 | Asp-73, Val-43, Val-167, Ala-47 | 8 | −6.3 | Asn-46 | Asp-73, Arg-76, Ala-47, Glu-50, Gly-77, Ile-78, Pro-79, Gly-75, Thr-165 | 11 | −7.3 | Arg-76, Asn-46, Gly-77, Thr-165 | Asp-73, Ile-78, Ile-94, Pro-79, Glu-50, Gly-75 | 14 | −6.3 | – | Ile-78, Val-167, Val-120 | 15 | −6.2 | – | Ala-47, Asn-46, Ile-78, Thr-165, Val-167 | 16 | −6.0 | Asp-73 | Ile-78 | 17 | −6.3 | Asp-73, Gly-77 | Ala-47, Glu-50, Ile-78, Pro-79, Thr-165 | Ciprofloxacin | −6.9 | Asp-73, Arg-76, Asn-46 | Ala-47, Ile-78, Ile-94, Pro-79, Glu-50, Gly-77 |
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