Robaxin-750,

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:77498
http://www.hmdb.ca/metabolites/HMDB0014567
http://www.genome.jp/dbget-bin/www_bget?drug:D00402
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=4107
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507761
https://www.chemspider.com/Chemical-Structure.3964.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50239995
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=6845
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=77498
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1201117
http://www.pharmgkb.org/drug/PA164749506
http://www.rxlist.com/cgi/generic/methocar.htm
https://www.drugs.com/methocarbamol.html
http://www.pdrhealth.com/drug_info/rxdrugprofiles/drugs/rob1384.shtml
https://en.wikipedia.org/wiki/Methocarbamol