| abstract |
Isoquinoline compounds having β-receptor blocking activity, particularly for the heart, and having the formula ##STR1## and salts thereof with physiologically tolerable acids, wherein R 1 is hydrogen or methyl, R 2 is hydrogen or lower alkyl, R 3 is hydrogen or methoxy, and R 4 is isopropyl or tertiary butyl. A method for making such compounds. Pharmaceutical compositions containing such compounds. |