Compounds are disclosed of formula (I) ##STR1## wherein R.sub.1 represents H or C.sub.1-6 alkyl; R.sub.2 represents H or C.sub.1-6 alkyl; R.sub.3 represents H; R.sub.4 represents H or C.sub.1-3 alkyl; and pharmaceutically acceptable salts and solvates (for example hydrates thereof. The compounds are indicated as 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.
公式(I)的化合物已被披露,其中R.sub.1代表H或C.sub.1-6烷基;R.sub.2代表H或C.sub.1-6烷基;R.sub.3代表H;R.sub.4代表H或C.sub.1-3烷基;以及药用盐和溶剂化物(例如其
水合物)。这些化合物被指示用于治疗偏头痛、集束头痛、慢性周期性半边头痛和与血管疾病相关的头痛。还披露了其制备的过程和中间体,以及含有它们的药物组合物。