le="" class="an ">&ensp;</span>showed <span  title="" class="an ">&ensp;</span>a <span  title="" class="an ">&ensp;</span>higher <span  title="" class="an ">&ensp;</span>potency <span  title="" class="an ">&ensp;</span>than <span  title="" class="an ">&ensp;</span><span  title="CAP" class="an CAP">LEV</span><span  title="" class="an ">&ensp;</span>The <span  title="" class="an ">&ensp;</span>effective <span  title="" class="an ">&ensp;</span>limitation <span  title="" class="an ">&ensp;</span>of <span  titl