Empetus

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:45409
http://www.hmdb.ca/metabolites/HMDB0014646
http://www.genome.jp/dbget-bin/www_bget?drug:D00427
http://www.genome.jp/dbget-bin/www_bget?cpd:C07240
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=392622
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505050
https://www.chemspider.com/Chemical-Structure.347980.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=520
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=85762
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=45409
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL163
https://zinc.docking.org/substances/ZINC000003944422
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000169
http://www.pharmgkb.org/drug/PA451260
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/RIT
http://www.rxlist.com/cgi/generic2/ritonavirsol.htm
https://www.drugs.com/cdi/ritonavir.html
https://en.wikipedia.org/wiki/Ritonavir