Protel

http://www.hmdb.ca/metabolites/HMDB0015023
http://www.genome.jp/dbget-bin/www_bget?drug:D01088
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=57697
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46509034
https://www.chemspider.com/Chemical-Structure.51990.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50323686
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=19551
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=134936
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1201198
https://zinc.docking.org/substances/ZINC000005783214
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP001064
http://www.pharmgkb.org/drug/PA164781018
http://www.rxlist.com/cgi/generic/alamast.htm
https://www.drugs.com/cdi/pemirolast.html
https://en.wikipedia.org/wiki/Pemirolast