TABLE TWO. Collision-induced dissociation fragments of nitroalkene fatty acid derivatives.

Nitroalkene derivatives of fatty acids were analyzed by electrospray-ionization tandem mass spectrometry. Product ion spectra from synthetic standards were obtained in the negative ion mode as described under “Materials and Methods.” Major fragments generated for each standard are listed below.

Mass/charge (m/z)	OA-NO2	[13C18]OA-NO2	LNO2
344		[M − H]
326	[M − H]	[M − (H + H2O)]
324			[M − H]
308	[M − (H + H2O)]	[M − (H + H2O)]
306			[M − (H + H2O)]
295		[M − (H + HNO2)]
293			[M − (H + HNO)]
279	[M − (H + HNO2)]
277			[M − (H + HNO2)]
263		[M − (H + H2O + CO2)]
246	[M − (H + H2O + CO2)]
244			[M − (H + H2O + CO2)]