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a) The overlaying XIC of the masses corresponding to the losses of the fatty acyl chains 18:2, 18:3, and 20:4. b) The CID spectrum of the ions at m/z 930.8 (the PB product of 872.7) eluted from time 21.4-22.7 minutes, c) The CID spectrum of the ions at m/z 930.8 (the PB product of 872.7) eluted from time 22.9-23.3 minutes.
