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Mass Spectrometry Analysis Using the Mass Spectrometry Fragment Tables, answer the following questions to interpret the mass spectrometry spectrum for unknown 17. Note: The mass spectrum was collected with the mass spectrometer in positive mode. Hint: you may like to revisit this section once you have a better idea of the structure from interpreting the other spectra. Unknown 17 MS Spectrum What is the base peak? (Give your answer as a whole number, no decimal places). 91 What is the parent peak? (Give your answer as a whole number, no decimal places). 172 What is the likely structure of the fragment ion at 91 m/z? ◆ What is the likely structure of the radical lost to give the fragment ion at 91 m/z? ◆ H. multiple H. CH3. NH2. OH. H20 CH2=CH2 CO• CH3CH2. CHO. •OCH3 •CH2OH CI. [CH3C=0]. CH3CH2CH2- [COOH]• •OCH2CH3 •C6H5 •Br [C7H7]. [CH3]+ [CH3CH2]+ [CHO]+ [CH2OH]+ [OCH3]+ [C3H6].+ [O=CCH3]+ [CH3CH2CH2]+ [O=C=NH2]+ [COOH]+ [C(CH3)3]+ [C2H5CO]+ [C4H9]+ [C5H5]+ [C4H6O]•+ [C3H7CO]+ [C4H90]++ [C6H4]++ [C6H5]+ [C7H7] + m/z m/z