| abstract |
Compounds of formula I, ##STR1## wherein R 1 is alkyl of 1 to 4 carbon atoms, n R 2 is hydrogen, alkyl of 1 to 4 carbon atoms or benzyl, n R 3 and R 5 are, independently, hydrogen or methyl, n R 4 is hydrogen or alkyl of 1 to 4 carbon atoms, and n R 6 and R 7 together form a single bond, or n R 6 and R 7 are each hydrogen, n R 6 is methoxy, and n R 7 is hydrogen, n Are useful in the treatment of hypertension, angina pectoris, depressions, neuroses and psychoses. |