| abstract |
Compounds having the formula (I):n wherein A is -CH 2 -, -O-, or -S-; R 1 is CH 3 or OCH 3 ; R 2 is hydroxy or carboxy which may be optionally esterified or amidated; R 3 is H or a lower alkyl; and n is 0 or an integer of 1 to 6, and pharmaceutically acceptable salts thereof, are disclosed. The compounds, and pharmaceutical compositions containing them, are used in therapy for cerebral insufficiency. |