138954.fig.001a
(a)
138954.fig.001b
(b)
138954.fig.001c
(c)
Figure 1: (a) Base peak chromatogram (BPC) from LC-MS of AMEtOH. (b) Extracted ion chromatogram (EIC) from 134.9 of AMEtOH; fragment ions were shown as insert. (c) BPC of authentic p-hydroxyacetophenone; fragment ions were shown as insert. All chromatograms were detected in the negative ion mode.