Diffumax

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:63082
http://www.hmdb.ca/metabolites/HMDB0015118
http://www.genome.jp/dbget-bin/www_bget?drug:D07990
http://www.genome.jp/dbget-bin/www_bget?cpd:C07805
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3410
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507099
https://www.chemspider.com/Chemical-Structure.3292.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=86453
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=25255
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=63082
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1256786
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000247
http://www.pharmgkb.org/drug/PA134687907
http://www.guidetopharmacology.org/GRAC/LigandDisplayForward?ligandId=3465
http://www.rxlist.com/cgi/generic/foradil.htm
https://www.drugs.com/cdi/formoterol.html
https://en.wikipedia.org/wiki/Formoterol