Levorphanol

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:6444
http://www.hmdb.ca/metabolites/HMDB0014992
http://www.genome.jp/dbget-bin/www_bget?drug:D08123
http://www.genome.jp/dbget-bin/www_bget?cpd:C08014
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5359272
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506558
https://www.chemspider.com/Chemical-Structure.16736212.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50369518
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=6378
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=6444
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL592
https://zinc.docking.org/substances/ZINC000003812984
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000268
http://www.pharmgkb.org/drug/PA164744368
http://www.rxlist.com/cgi/generic2/levorphanol.htm
https://www.drugs.com/cdi/levorphanol.html
https://en.wikipedia.org/wiki/Levorphanol