Figure 3.

Extracted ion chromatogram (EIC) at m/z 852, full scan spectrum (MS1) at 9.43 min, fragmentation mass spectrum (MS2) and proposed structure of the new AP 851 with [M + H]⁺ at m/z 852. (m/z 834 = [M + H − H₂O]⁺, m/z 807 = [M + H − OCH₂CH₃]⁺, m/z 677 = [M + H − OEtGlu]⁺, m/z 675 = [M + H − Hty]⁺, m/z 651 = [Lys-Leu/Ile-Hty-MeAla-Phe + H]⁺, m/z 649 = [M + H − OetGlu − CO]⁺, m/z 564 = [Phe-Lys-Leu/Ile-Hty + H]⁺, m/z 405 = [MeAla-Phe-Lys-CO-NH₂ + H]⁺, m/z 376 = [Leu/Ile-Hty-MeAla + H]⁺, m/z 320 = [Phe-Lys-CO-NH₂ + H]⁺, m/z 263 = [MeAla-Hty + H]⁺, m/z 150 = Hty immonium ions, m/z 120 = Phe immonium ion, m/z 107 = Hty related ion, m/z 102 = Glu immonium ion, m/z 86 = Leu/Ile immonium ion, m/z 84 = Lys immonium ion).