What do the structural formulas of the analgesic drugs Tylenol and Advil have in common?
The question is above and unfortunately I don’t have any more information I can give you.
What I ask is that you answer this question and you must provide links to your sources. The one who answers the “best” and provides links to his sources will get the 10 points. If it comes down to two people having equally good answers, I will choose whoever comes first.
Thanks in advance!

April 18th, 2010 at 5:48 am
They both have a single large organic ring.
http://en.wikipedia.org/wiki/Image:Ibuprofen.svg
http://en.wikipedia.org/wiki/Image:Paracetamol-from-xtal-3D-balls.png