Hycodan

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:5779
http://www.hmdb.ca/metabolites/HMDB0015091
http://www.genome.jp/dbget-bin/www_bget?drug:D08045
http://www.genome.jp/dbget-bin/www_bget?cpd:C08024
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5284569
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506225
https://www.chemspider.com/Chemical-Structure.4447623.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50386689
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=5489
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=5779
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1457
https://zinc.docking.org/substances/ZINC000001280665
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000253
http://www.pharmgkb.org/drug/PA449900
http://www.rxlist.com/cgi/generic/hydrocod.htm
https://en.wikipedia.org/wiki/Hydrocodone