<beilsteinTutorial creator="nicmila@idoox.com">
<key>atom exclusion</key><key>Q</key>

<description>Find unsubstituted heteroanalogs of benzene containing one heteroatom in the ring.</description>

<query>
<subquery pict="ex3A" hits="2939">NOT[C] selects any atom but carbon</subquery>
<hit brn="103233" class="hit"></hit>
<hit brn="105944" class="hit"></hit>
<hit brn="3637491" class="hit"></hit>
<hit brn="605434" class="hit"></hit>
<hit brn="1363729" class="hit"></hit>
<hit brn="7609742" class="hit"></hit>
</query>

<query>
<subquery pict="ex3B" hits="2939">Q selects any atom with exception of both hydrogen and carbon</subquery>
<hit brn="103233" class="hit"></hit>
<hit brn="105944" class="hit"></hit>
<hit brn="3637491" class="hit"></hit>
<hit brn="605434" class="hit"></hit>
<hit brn="1363729" class="hit"></hit>
<hit brn="7609742" class="hit"></hit>
</query>
<query>
<subquery pict="ex3C" hits="36">This query misses pyridine, but results in very substational reduction of hits</subquery>
<hit brn="605434" class="hit"></hit>
<hit brn="1363729" class="hit"></hit>
<hit brn="7609742" class="hit"></hit>
<hit brn="103233" class="missed"></hit>
<hit brn="105944" class="missed"></hit>
<hit brn="3637491" class="missed"></hit>
</query>
</beilsteinTutorial>