Frispec

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0002448
http://classyfire.wishartlab.com/tax_nodes/C0002341
http://classyfire.wishartlab.com/tax_nodes/C0000138
http://classyfire.wishartlab.com/tax_nodes/C0000138
http://classyfire.wishartlab.com/tax_nodes/C0004742
http://classyfire.wishartlab.com/tax_nodes/C0004113
http://classyfire.wishartlab.com/tax_nodes/C0000128
http://classyfire.wishartlab.com/tax_nodes/C0001661
http://classyfire.wishartlab.com/tax_nodes/C0002467
http://classyfire.wishartlab.com/tax_nodes/C0000286
http://classyfire.wishartlab.com/tax_nodes/C0004150
http://www.hmdb.ca/metabolites/HMDB0004998
http://www.genome.jp/dbget-bin/www_bget?drug:D00337
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3516
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508004
https://www.chemspider.com/Chemical-Structure.3396.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50240098
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=5032
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=5551
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL980
http://www.pharmgkb.org/drug/PA449818
http://www.rxlist.com/cgi/generic2/guaifen.htm
https://www.drugs.com/guaifenesin.html
http://www.pdrhealth.com/drug_info/rxdrugprofiles/drugs/tus1463.shtml
https://en.wikipedia.org/wiki/Guaifenesin