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  Indian J Med Microbiol
 

Figure 1: The products spectra and fragmentation reaction of the seven compounds in positive electrospray ionization mode: (a) phellodendrine, (b) magnoflorine, (c) jatrorrhizine, (d) palmatine, (e) berberine, (f) obacunone, and (g) nimodipine

Figure 1: The products spectra and fragmentation reaction of the seven compounds in positive electrospray ionization mode: (a) phellodendrine, (b) magnoflorine, (c) jatrorrhizine, (d) palmatine, (e) berberine, (f) obacunone, and (g) nimodipine