| 摘要 |
<p>Compounds are disclosed of the formula wherein two of R1, R2 and R3 are hydrogen and the third group is hydrogen, lower alkyl, fluoro, chloro, bromo, lower alkoxy, lower alkenyloxy; and R5 is isopropyl or tertiary butyl. These compounds find use as .beta.-adrenergic blocking agents and vasodilators.</p> |
