Fig. 2.

LC‒MS analysis for metabolomic profiling of SPrecm: a Metabolomic profiling in positive-ion mode showing the presence of cis-1,2-bis-[(E)-3,4-dimethoxystyryl] cyclobutane, fructose, pinocembrin, (Z)-1-(2,4,5-trimethoxyphenyl)butadiene (E-12 or Z-12), and protocatechuic acid at precursor ion peaks m/z 381.17, 365.17, 257.17, 221.17, and 156.00, respectively. b Metabolomic profiling in negative-ion mode shows the presence of oleuropein aglycone, paniculide C, chrysin, and 4-(1-benzofuron-5-yl) benzaldehyde at precursor ion peaks m/z 377.17, 279.25, 253.17, and 121.00, respectively