Circupon

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0002448
http://classyfire.wishartlab.com/tax_nodes/C0000134
http://classyfire.wishartlab.com/tax_nodes/C0004647
http://classyfire.wishartlab.com/tax_nodes/C0004647
http://classyfire.wishartlab.com/tax_nodes/C0003899
http://classyfire.wishartlab.com/tax_nodes/C0004646
http://classyfire.wishartlab.com/tax_nodes/C0002279
http://classyfire.wishartlab.com/tax_nodes/C0001661
http://classyfire.wishartlab.com/tax_nodes/C0001897
http://classyfire.wishartlab.com/tax_nodes/C0002228
http://classyfire.wishartlab.com/tax_nodes/C0004557
http://classyfire.wishartlab.com/tax_nodes/C0004150
http://classyfire.wishartlab.com/tax_nodes/C0003073
http://www.genome.jp/dbget-bin/www_bget?drug:D07931
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3306
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=310264946
https://www.chemspider.com/Chemical-Structure.3190.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=97154
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=4169
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=91518
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL86882
https://en.wikipedia.org/wiki/Etilefrine