| 摘要 |
<p>@ Compounds of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="46" wi="101" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R' is ethyl, n-propyl or n-butyl, and R' is hydrogen, methyl or ethyl, exhibit bronchodilating activity with reduced side effects and increased half-life. A method of achieving broncholidation with reduced undesired effects (diuresis, CNS activity), by administering the said compounds to a patient, is also provided.</p> |
