386301.fig.003a
(a)
386301.fig.003b
(b)
386301.fig.003c
(c)
386301.fig.003d
(d)
386301.fig.003e
(e)
386301.fig.003f
(f)
386301.fig.003g
(g)
Figure 3: (a) ESI mass spectrum of compound 3c [M + H]+ ion (m/z 348.20). (b) MS2 spectrum of m/z 348.20. (c) In-source fragmentation of compound 3c. (d) MS2 spectrum of m/z 280.22. (e) MS2 spectrum of m/z 241.10. (f) MS2 spectrum of m/z 183.10. (g) MS2 spectrum of m/z 173.10.