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ESI-MS/MS spectrum of control CL with m/z 1447.7. Major fragment with m/z 695.2 is phosphatidic acid containing two C18:2 residues and m/z 831.2 is glycerophosphatidic acid containing two C18:2 residues. The fragment with m/z 751.2 is glycerol added to the fragment with m/z 695.2.
