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1D and 2D Spectroscopy: Elucidation of a Complex Structure


I have some data to help me solve a structure via High Resolution NMR, however being new to this, I am having extreme difficulty, and was wondering if someone could help please - or even point me in the right direction as how to go about solving for structure A?

A has a molecular formula: C12H15O4N.
The 13CNMR data showed signals the following 13C chemical shifts:
15.5, 25.6, 27.5, 42.2, 50.5, 60.4, 87.9, 123.0, 142,1, 172.5, and 203.5 ppm.

I have attached data to this description, however, in an NOE experiment, radiation of the proton signal at 6.40 ppm resulted in a +ve enhancement of the signal at 2.46 ppm. Irradiation of the signal at 1.05 resulted in an enhancement at 1.29 ppm


Solution Summary

1H NMR, 13C NMR, COSY, NOESY, HMBC and HSQC are used to solve the structure of a complex molecule.