Usamema

http://www.hmdb.ca/metabolites/HMDB0014497
http://www.genome.jp/dbget-bin/www_bget?drug:D00680
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=8226
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507746
https://www.chemspider.com/Chemical-Structure.7933.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50330860
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=6883
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=92607
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1201356
https://zinc.docking.org/substances/ZINC000095619105
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000978
http://www.pharmgkb.org/drug/PA450461
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/H8D
http://www.rxlist.com/cgi/generic2/methylerg.htm
https://www.drugs.com/cdi/methylergonovine.html
http://www.pdrhealth.com/drug_info/rxdrugprofiles/drugs/met1256.shtml
https://en.wikipedia.org/wiki/Methylergometrine