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https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:3374
http://www.genome.jp/dbget-bin/www_bget?cpd:C06866
http://www.hmdb.ca/metabolites/HMDB0002227
http://www.genome.jp/dbget-bin/www_bget?drug:D00250
http://www.genome.jp/dbget-bin/www_bget?cpd:C06866
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=1548943
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=347827793
https://www.chemspider.com/Chemical-Structure.1265957.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=20461
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=1992
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=3374
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL294199
https://zinc.docking.org/substances/ZINC000001530575
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/4DY
http://www.rxlist.com/qutenza-drug.htm
https://www.drugs.com/ppa/capsaicin.html
https://en.wikipedia.org/wiki/Capsaicin