Varenicline

http://www.hmdb.ca/metabolites/HMDB0015398
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5310966
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505502
https://www.chemspider.com/Chemical-Structure.148958.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50166908
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=591622
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=84500
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1396
https://zinc.docking.org/substances/ZINC000001481833
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP001535
http://www.pharmgkb.org/drug/PA164781343
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/QMR
http://www.rxlist.com/cgi/generic/chantix.htm
https://www.drugs.com/cdi/varenicline.html
https://en.wikipedia.org/wiki/Varenicline