The present invention is concerned with compounds of formula (I) ##STR1## wherein R.sup.1 is hydrogen or C.sub.1-4 alkoxy; R.sub.2 is carbonyl, hydroxymethylene, or methylene; and R.sub.3 is hydrogen or hydroxy; and salts thereof, provided that when R.sub.1 is hydrogen and R.sub.2 is carbonyl, R.sub.3 is not hydroxy, with processes for preparing same and with their use in medicine for the treatment of hypertension.
The present invention is concerned with compounds of formula (I) ##STR1## wherein R.sub.1 is hydrogen; R.sub.2 is carbonyl; and R.sub.3 is hydroxy; and salts thereof, with processes for preparing same and with their use in medicine for the treatment of hypertension.