The molecule is the L-(+)-tartaric acid salt of dihydroergotamine, a semisynthetic ergot alkaloid with weaker oxytocic and vasoconstrictor properties than ergotamine. Both the tartrate and the mesylate salts are used for the treatment of migraine and orthostatic hypotension. It has a role as a serotonergic agonist, a non-narcotic analgesic and a vasoconstrictor agent. It contains a dihydroergotamine.
(6aR,9R,10aR)-N-[(1S,2S,4R,7S)-7-benzyl-2-hydroxy-4-methyl-5,8-dioxo-3-oxa-6,9-diazatricyclo[7.3.0.02,6]dodecan-4-yl]-7-methyl-6,6a,8,9,10,10a-hexahydro-4H-indolo[4,3-fg]quinoline-9-carboxamide;(2R,3R)-2,3-dihydroxybutanedioic acid