## str1 ## compounds of formula where n is 0 , 1 , or 2 ; m is 0 or 1 ; y and w are each an amino acid residue ; r 1 is hydrogen , c 1 - c 6 alkyl , c 3 - c 6 alkenyl , c 3 - c 6 alkynyl , aryl , c 1 - c 3 alkylaryl , or c 1 - c 3 alkylheteroaryl , and -- p r 3 ; r 2 is cf 3 , c 1 - c 6 alkyl , aryl , c 1 - c 3 alkylaryl , and -- or 5 ; r 3 is cyano , trifluoromethyl , or -- or 4 ; r 4 is hydrogen , c 1 - c 6 alkyl , c 1 - c 3 alkylaryl , or aryl ; r 5 is c 1 - c 6 alkyl , c 1 - c 3 alkylaryl , or aryl ; r 6 is hydrogen , -- or 7 , or -- nhcor 7 ; r 7 is hydrogen , c 1 to c 6 alkyl , aryl or c 1 to c 3 alkyl - aryl ; p is 1 , 2 , or 3 ; and the above aryl groups and the aryl moieties of the above alkyl - aryl groups are independently selected from phenyl and substituted phenyl , wherein said substituted phenyl may be substituted with one to three groups selected from c 1 to c 4 alkyl , halogen , hydroxy , cyano , carboxamide , nitro , and c 1 to c 4 alkoxy and the pharmaceutically acceptable salts thereof . these compounds are useful in treating migraine and other disorders . these compound are useful psychotherapeutics and are potent serotonin agonists and may be used in the treatment of depression , anxiety , eating disorders , obesity , drug abuse , cluster headache , migraine , pain , and chronic paroxysmal hemicrania and headache associated with vascular disorders , and other disorders arising from deficient serotonergic neurotransmission . the compounds can also be used as centrally acting antihypertensives and vasodilators .