please help me with these

what are the functional group(s) in Lexiva (Fosamprenavir Calcium)?
i only know that it has an amine group but i'm not sure if there is another group!!!

and how can i relate Lexiva to chemistry?(ideas please)

Here is a site that gives the chemical structure. Looks like a bunch of functional groups to me. I couldn't find anything on the chemisty of the drug.

http://en.wikipedia.org/wiki/Fosamprenavir