The chemical Dihydroergotamine mesylate has a designated molecular formula of C34H41N5O8S and a molecular weight of 679.789 g/mol. Synonyms may include: DETMS, DHE-45, Dihydergot, Dihydroergotamine mesilate, Dihydroergotamine mesylate, 9,10-Dihydroergotamine mesylate, Dihydroergotamine methanesulfonate, Dihytamine, EINECS 228-235-6, MT 300, D.H.E. 45, Migranal (ChemID). Dihydroergotamine mesylate has been assigned a MeSH pharmacological action of: Dopamine Agonist.