pystinon

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:8665
http://www.hmdb.ca/metabolites/HMDB0014685
http://www.genome.jp/dbget-bin/www_bget?drug:D00487
http://www.genome.jp/dbget-bin/www_bget?cpd:C07410
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=4991
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506129
https://www.chemspider.com/Chemical-Structure.4817.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50313079
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=9000
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=8665
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1115
https://zinc.docking.org/substances/ZINC000000002009
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DNC001171
http://www.pharmgkb.org/drug/PA451185
http://www.rxlist.com/cgi/generic2/pyridostigmine.htm
https://www.drugs.com/cdi/pyridostigmine.html
https://en.wikipedia.org/wiki/Pyridostigmine