INDOLE DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

Compounds are disclosed of formula (I) CHEM wherein R1 represents a C1-6alkyl group; R2 represents a hydrogen atom or a C1-3alkyl group; n represents zero or an integer from 1 to 3; and pharmaceutically acceptable salts thereof. The compounds are useful for the treatment of migraine, cluster headache, chronic paroxysmal hemicrania and headache associated with vascular disorders. Processes and intermediates for their preparation and pharmaceutical compositions containing them are also disclosed.