Claviceps purpurea is a pathogenic fungus belonging to the family Clavicipitaceae. The fungus grows on the rye and other cereal crops. Ergotamine is a secondary metabolite/ergot alkaloid the ergot fungus Claviceps purpurea. Ergotamine tartrate (C70H76N10O16, molecular weight: 1313.4) is the tartrate salt form of the alkaloid ergotamine.
The alkaloid ergotamine tartrate is used as a medicine to treats migraine headaches. The alkaloid is used earlier for the treatment of headaches but now the drug is not available.