span  title="" class="an ">&ensp;</span>antagonist <span  title="" class="an ">&ensp;</span>methoxyphenyl <span  title="" class="an ">&ensp;</span>phthalimido <span  title="" class="an ">&ensp;</span>butyl <span  title="" class="an ">&ensp;</span>piperazine <span  title="" class="an ">&ensp;</span>hydrobromide <span  title="" class="an ">&ensp;</span><span  title="CAP" class="an CAP">NAN</span><span  title="" class="an ">&ensp;</span>but <span  title="" class="an ">&ensp;</span>not <span  title="" class="an