Versant-xr

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:585948
http://www.hmdb.ca/metabolites/HMDB0015158
http://www.genome.jp/dbget-bin/www_bget?drug:D00319
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3333
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506968
https://www.chemspider.com/Chemical-Structure.3216.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=189379
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=4316
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=585948
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1480
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000487
http://www.pharmgkb.org/drug/PA449591
http://www.guidetopharmacology.org/GRAC/LigandDisplayForward?ligandId=4190
http://www.rxlist.com/cgi/generic2/felo.htm
https://www.drugs.com/cdi/felodipine.html
http://www.pdrhealth.com/drugs/rx/rx-mono.aspx?contentFileName=ple1339.html&contentName=Plendil&contentId=593
https://en.wikipedia.org/wiki/Felodipine