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. 2022 May 12;13:2652. doi: 10.1038/s41467-022-30249-z

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© The Author(s) 2022

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Fig. 3 — a Photocycloaddition and photoisomerization reactions of FA 18:1 (9Z). The photocatalyst is Ir[dF(CF₃)ppy]₂(dtbbpy)PF₆. b Mass spectrum of the photocatalytic reaction solution of FA 18:1 (9Z) in negative ion mode. c MS/MS spectrum of the sodiated photocycloaddition product P1/P2 in positive ion mode. Peak at m/z 187.03 denotes the fragment ion of the methyl benzoylformate motif. Peaks at m/z 409.27 and 437.27 may be assigned to the fragment ions of P1/P2 after losing the CO₂Me and MeOH structures, respectively. d Extracted ion chromatograms (EIC) of FA 18:1 (9Z) and FA 18:1 (9E) before and after the photocatalytic reaction in negative ion mode.