Butal

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0004707
http://classyfire.wishartlab.com/tax_nodes/C0000278
http://classyfire.wishartlab.com/tax_nodes/C0002449
http://classyfire.wishartlab.com/tax_nodes/C0001897
http://classyfire.wishartlab.com/tax_nodes/C0002228
http://classyfire.wishartlab.com/tax_nodes/C0000286
http://classyfire.wishartlab.com/tax_nodes/C0004557
http://classyfire.wishartlab.com/tax_nodes/C0004150
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:4877
http://www.hmdb.ca/metabolites/HMDB0014474
http://www.genome.jp/dbget-bin/www_bget?drug:D07925
http://www.genome.jp/dbget-bin/www_bget?cpd:C06984
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=14052
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46504788
https://www.chemspider.com/Chemical-Structure.13433.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50448407
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=4110
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=4877
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL44884
https://zinc.docking.org/substances/ZINC000019364219
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000055
http://www.pharmgkb.org/drug/PA164784021
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/95E
http://www.rxlist.com/cgi/generic2/ethambutol.htm
https://www.drugs.com/cdi/ethambutol.html
https://en.wikipedia.org/wiki/Ethambutol