"an alkaloid derived from ergot that is less toxic than ergot; causes constriction of blood vessels and is used to treat migraine"@en-us . . . . "ergotamine"@en-us . "113873234"@en-us . "an alkaloid derived from ergot that is less toxic than ergot; causes constriction of blood vessels and is used to treat migraine"@en-us . "0"^^ . "114714028"^^ . . "0"^^ . "ergotamine"^^ . "14714028-n"^^ . . . . . .