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(A) The extracted ion chromatograms (EICs) showed that the levels of the possible metabolites M1–M3 increased with increasing time. (B) The MS/MS data of the timosaponin BII metabolites M1–M3. (C) Possible structures and mass spectrometric cleavage pathway of metabolites M1–M3. Among them, the structure framed by a rectangle was reported in the gut microbiota for the first time.
