compounds effective in treating disorders of the serotonin - affected neurological systems are provided , such compounds having the following formula : ## str1 ## wherein : r 1 and r 2 are each , independently , hydrogen , halogen , cf 3 , lower alkyl , lower alkoxy , meso 2 , or together can form a 5 - 7 membered carbocyclic or heterocyclic ring ; r 3 is alkoxy , halogen , hydrogen or carbamoyl ; r 4 is hydrogen , hydroxy , lower alkyl , or lower alkoxy ; r 5 is hydrogen , lower alkyl , or halogen ; r 6 is hydrogen , lower alkyl , or phenyl ; r 7 is hydrogen , lower alkyl , lower alkoxy , halogen , cn , cf 3 , or hydroxy ; and x is n , wherein n is 0 to 3 ; or pharmaceutically acceptable salts thereof .