摘要 |
<p>Compounds of the formula (I):
<CHEM>
and pharmaceutically acceptable salts are described, wherein R is hydrogen or C1-4 alkyl. These compounds are vasodilators and beta -adrenoceptor antagonists. Pharmaceutical compositions are described as are methods of use. Intermediates and processes for the preparation of the compounds of the formula (I) are also described.</p> |