Penstapho

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:7809
http://www.hmdb.ca/metabolites/HMDB0014851
http://www.genome.jp/dbget-bin/www_bget?drug:D08307
http://www.genome.jp/dbget-bin/www_bget?cpd:C07334
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=6196
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505710
https://www.chemspider.com/Chemical-Structure.5961.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50350483
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=7773
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=7809
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL819
https://zinc.docking.org/substances/ZINC000003875439
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000440
http://www.pharmgkb.org/drug/PA450725
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/105
http://www.rxlist.com/cgi/generic/oxacillin.htm
https://www.drugs.com/cdi/oxacillin.html
https://en.wikipedia.org/wiki/Oxacillin