Fig. 4.
Mass spectra of isoscoparin 2′′-O-(6′′′-(E)-feruloyl)-glucopyranoside (25) (m/z 800) at ramped collision energy from 10 to 50 eV in positive ionization mode. The upper figure shows the display range at m/z 50–850, the lower figure shows the expanding range at m/z 300–480