Evidence-Based Complementary and Alternative Medicine / 2017 / Article / Fig 3

Research Article

Rapid Screening of Chemical Constituents in Rhizoma Anemarrhenae by UPLC-Q-TOF/MS Combined with Data Postprocessing Techniques

Figure 3

The fragmentation pathways of spirostanol saponins, taking purpureagitoside as the example: the ion at m/z 739 was the molecular ion [M-H], the ion at m/z 577 [M-H-C6H10O5] was produced by the loss of a hexose unit (Glc, 162 Da), the fragment ion at m/z 415 [M-H-2C6H10O5] could be explained by ejecting a pentose unit (Gal, 162 Da) from the ion at m/z 577, the fragment ion at m/z 273 was formed by the cleavage of the E-ring, and the fragmentation of m/z 255 was obtained by the fragmentation m/z 273 to lose a water molecule.

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