Quarzan

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:3743
http://www.hmdb.ca/metabolites/HMDB0014909
http://www.genome.jp/dbget-bin/www_bget?cpd:C07853
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2784
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507814
https://www.chemspider.com/Chemical-Structure.26330531.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50055977
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=21232
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=3743
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP001117
http://www.pharmgkb.org/drug/PA164781044
http://www.guidetopharmacology.org/GRAC/LigandDisplayForward?ligandId=366
https://www.drugs.com/mtm/clidinium.html
https://en.wikipedia.org/wiki/Clidinium_bromide