Citisoline

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:16436
http://www.hmdb.ca/metabolites/HMDB0001413
http://www.genome.jp/dbget-bin/www_bget?drug:D00057
http://www.genome.jp/dbget-bin/www_bget?cpd:C00307
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=347911290
https://www.chemspider.com/Chemical-Structure.13207.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=997602
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=16436
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1231700
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/CDC
https://en.wikipedia.org/wiki/Citicoline