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MRM chromatogram for: 3 (A); 4 (B); 5 (C); and 6 (D) in Salicornia herbacea. Dicaffeoylquinic acid derivatives were analyzed by LC-ESI-MS/MS. Compounds were detected by MRM: m/z 517.0 [M − H]– → 355.2 for 3; m/z 531.0 [M − H]– → 161.0 for 4, m/z 531.0 [M − H]– → 161.0 for 5, and m/z 533.0 [M − H]– → 184.2 for 6. Detailed procedures for LC-ESI-MS/MS analysis have been described in Materials and Methods.
