Orstanorm

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:4562
http://www.hmdb.ca/metabolites/HMDB0014465
http://www.genome.jp/dbget-bin/www_bget?cpd:C07798
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=10531
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507711
https://www.chemspider.com/Chemical-Structure.10091.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50295557
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=3418
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=4562
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1732
https://zinc.docking.org/substances/ZINC000003978005
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000078
http://www.pharmgkb.org/drug/PA164743028
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/2GM
http://www.rxlist.com/cgi/generic2/dihyergmes.htm
https://www.drugs.com/cdi/dihydroergotamine.html
http://www.pdrhealth.com/drug_info/rxdrugprofiles/drugs/mig1267.shtml
https://en.wikipedia.org/wiki/Dihydroergotamine