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HPLC-UV chromatograms of the purified AFG2 (A), AFG1 (D), AFB2 (G) and AFB1 (J); Mass spectra of the purified AFG2 (B), AFG1 (E), AFB2 (H) and AFB1 (K); and MS2 spectra of the [M + H]+ adduct ions of the purified AFG2 (C), AFG1 (F), AFB2 (I) and AFB1 (L).
