Chemical formula
<a href="https://en.wikipedia.org/wiki/User:Pcp042015" class="extiw" title="w:User:Pcp042015">w:User:Pcp042015</a>
deleted <a href="https://en.wikipedia.org/wiki/File:AI-10-49_Structure.pdf" class="extiw" title="w:File:AI-10-49 Structure.pdf">w:File:AI-10-49 Structure.pdf</a>