<beilsteinTutorial creator="nicmila@idoox.com">
<key>free sites</key><key>molecular formula</key><key>mf</key><key>element count</key><key>elc</key>
<description>Find all monohalogen derivatives of benzo[a]anthracene.</description>

<query>
<comment>There are 12 possible positions to put halogen in and so explicit search for each individual isomer can be a time consuming task. These queries represent a viable alternative. </comment>
<subquery hits="1234" pict="ex9A" conditions='impl.free.sites, no.impl.ring.closures' ></subquery>
<subquery hits="71" text="mf=C18H11F or mf=C18H11Cl or mf=C18H11Br or mf=C18H11I">Formula must be given in order: C, H and then alphabetic order (Hill order)</subquery>
<subquery text=".Q1 and.Q2" hits="17"></subquery>
<hit brn="2332022" class="hit"></hit>
<hit brn="2456810" class="hit"></hit>
</query>

<query>
<comment></comment>
<subquery hits="1234" pict="ex9A" conditions='impl.free.sites, no.impl.ring.closures' ></subquery>
<subquery hits="1424" text="(elc=F or elc=Cl or elc=Br or elc=I) and elc=C18 and elc=H11"></subquery>
<subquery text=".Q1 and.Q2" hits="28"></subquery>
<hit brn="2332022" class="hit"></hit>
<hit brn="2456810" class="hit"></hit>
<hit brn="2532598" class="extra"></hit>
<hit brn="2565124" class="extra"></hit>
</query>
</beilsteinTutorial>