Makrelex

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:63629
http://www.hmdb.ca/metabolites/HMDB0060964
http://www.genome.jp/dbget-bin/www_bget?cpd:C07452
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5487
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505373
https://www.chemspider.com/Chemical-Structure.5287.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50240671
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=57258
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=63629
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1079
https://zinc.docking.org/substances/ZINC000019702309
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000234
http://www.pharmgkb.org/drug/PA451701
http://www.rxlist.com/cgi/generic/tizanidine.htm
https://www.drugs.com/tizanidine.html
https://en.wikipedia.org/wiki/Tizanidine