Nukik

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0000002
http://classyfire.wishartlab.com/tax_nodes/C0000089
http://classyfire.wishartlab.com/tax_nodes/C0001322
http://classyfire.wishartlab.com/tax_nodes/C0002414
http://classyfire.wishartlab.com/tax_nodes/C0004144
http://classyfire.wishartlab.com/tax_nodes/C0001137
http://classyfire.wishartlab.com/tax_nodes/C0001205
http://classyfire.wishartlab.com/tax_nodes/C0004139
http://classyfire.wishartlab.com/tax_nodes/C0004557
http://classyfire.wishartlab.com/tax_nodes/C0000323
http://classyfire.wishartlab.com/tax_nodes/C0000278
http://classyfire.wishartlab.com/tax_nodes/C0003940
http://classyfire.wishartlab.com/tax_nodes/C0004150
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:15940
http://www.genome.jp/dbget-bin/www_bget?cpd:C00253
http://www.hmdb.ca/metabolites/HMDB0001488
http://www.genome.jp/dbget-bin/www_bget?drug:D00049
http://www.genome.jp/dbget-bin/www_bget?cpd:C00253
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=938
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507508
https://www.chemspider.com/Chemical-Structure.913.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=23515
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=7393
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=15940
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL573
https://zinc.docking.org/substances/ZINC000000001795
http://www.pharmgkb.org/drug/PA450617
http://www.guidetopharmacology.org/GRAC/LigandDisplayForward?ligandId=1594
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/NIO
http://www.rxlist.com/cgi/generic3/niacor.htm
https://www.drugs.com/niacin.html
https://en.wikipedia.org/wiki/Niacin