Interpretation and Assignment of IR Spectrum of Caffeine

Would you please provide me with some information regarding the infra-red spectrum of caffeine. Attached I have a labeled spectra of caffeine would you please tell me how I would label it. The lines on my spectra of caffeine are :1650.49;1696.46;1548.42;1485.28;1455.52;1356.19;1237.09;758.34;744.96 all of these numbers are on my caffeine spectra. Would you please HELP!

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Solution Summary

The infrared spectrum of caffeine is rigorously assigned.