Leap

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:63634
http://www.hmdb.ca/metabolites/HMDB0005033
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=119607
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506229
https://www.chemspider.com/Chemical-Structure.106796.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=13063
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=278567
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=63634
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL865
https://zinc.docking.org/substances/ZINC000000006694
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP001541
http://www.pharmgkb.org/drug/PA10226
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/COX
http://www.rxlist.com/cgi/generic/bextra.htm
https://www.drugs.com/mtm/valdecoxib.html
https://en.wikipedia.org/wiki/Valdecoxib