Consider the following spectroscopic data for the identification of an organic intermediate for the synthesis of a 1,3,4-oxadiazole. The mass spectrum shows a molecular ion at 157 m/z, with an M+1 peak at about 7.42% of the molecular ion. There is also an M+2 peak with an abundance that is ~32% of the molecular ion. Provide the structure of this unknown compound and fill in the mass spec table provided below.

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8 100 90 80 70- 60 50- 40 30- 20 10 240 220 200 180 160 140 120 100 60 60 40 20 157 158 amu 161 162 159 160 % Abundance Information Gleaned m/2 157 100 7.42 158 159 32.02 8 100 90 80 70- 60 50- 40 30- 20 10 240 220 200 180 160 140 120 100 60 60 40 20 157 158 amu 161 162 159 160 % Abundance Information Gleaned m/2 157 100 7.42 158 159 32.02