Eserine

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27953
http://www.genome.jp/dbget-bin/www_bget?cpd:C06535
http://www.hmdb.ca/metabolites/HMDB0015116
http://www.genome.jp/dbget-bin/www_bget?drug:D00196
http://www.genome.jp/dbget-bin/www_bget?cpd:C06535
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5983
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506998
https://www.chemspider.com/Chemical-Structure.5763.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50222010
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=8299
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=27953
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL94
https://zinc.docking.org/substances/ZINC000091689892
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000561
http://www.pharmgkb.org/drug/PA450957
http://www.rxlist.com/cgi/generic/physostigmine.htm
https://www.drugs.com/mtm/physostigmine-ophthalmic.html
https://en.wikipedia.org/wiki/Physostigmine