Acknowledgments The antagonist potency of the hits discovered in the in silico study were carried out by Cerep under contracts FR095-0020745 and FR095-0021802 and is gratefully acknowledged. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Author Contributions Conceptualization, J.J.P.; methodology, P.G.-G.; calculations and formal analysis, P.G.-G.; writing, J.J.P. All authors have read and agreed to the published version of the manuscript. Funding The present study was funded by the Spanish Ministry of Science and Innovation through the Carlos III Institute of Health under contract COV20/00052. Institutional Review Board Statement Not applicable. Informed Consent Statement Not applicable. Data Availability Statement The data presented in this study are available upon request from the corresponding author. Conflicts of Interest The authors declare no conflict of interest.