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Chromatogram of selected reaction monitoring (SRM) of metabolites detected in human plasma : 15-F2t-IsoP, 15-epi-15-F2t-IsoP (A) ; 5-F2t-IsoP, 5-epi-5-F2t-IsoP (B) ; 10-F4t-NeuroP, 10-epi-10-F4t-NeuroP (C) ; 4(RS)-F4t-NeuroP (D) ; internal standard d4-15-F2t-IsoP (E).
