Characteristics peaks of caffeine on UV-visible spectrophotometry?

identify which peaks and wavlength (cm^-1).
also need identifcation of bands like C=O strech.

Answer:
Dear friend:

There is a method, but is longer, this web page will be usefull for you:
http://www.shsu.edu/~chemistry/primers/p...

and here too is very good information:

http://www.ikm.org.my/mjc8045-051_mamumi...
In UV 272 nm (3676 cm-1)

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