Antipyrine

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:31225
http://www.hmdb.ca/metabolites/HMDB0015503
http://www.genome.jp/dbget-bin/www_bget?drug:D01776
http://www.genome.jp/dbget-bin/www_bget?cpd:C13244
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2206
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505216
https://www.chemspider.com/Chemical-Structure.2121.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50103600
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=1001
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=31225
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL277474
https://zinc.docking.org/substances/ZINC000000061044
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DNC001118
http://www.pharmgkb.org/drug/PA448453
http://www.pdrhealth.com/drug_info/rxdrugprofiles/drugs/ant1656.shtml
https://en.wikipedia.org/wiki/Phenazone