The ultimate test of fluency in MS and IR is whether you can determine a moderately complex structure from just the MS and the IR, with no additional information. The IR and MS of a compound are shown below. Use everything you know about IR and MS, plus reasoning and intuition, to determine a likely structure. Then show how your proposed structure is consistent with these spectra.

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100 106 80 60 121 M* 40 77 20 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 mlz abundance