Components Fructus Rat plasma after oral Forsythiae administration of extract Fructus Forsythiae extract 1 Quinic acid + + 2 Forsythoside D + + 3 Caffeic acid + + 4 Forsythoside E + + 5 Hyperoside + + 6 Isoforsythoside + + 7 Rutin + + 8 lsoquercitin + + 9 Forsythoside B + + 10 Forsythoside A + + 11 Pinoresinol-[beta]- + + D-glucoside 12 Al# - + 13 Epipinoresinol- + + [beta]-D-glucoside 14 A2# - + 15 Pinoresinol + - monomethylether- [beta]-D-glucoside 16 Phillyrin + + 17 Quercetin + + 18 Arctiin + - 19 A3# - + 20 Epipinoresinol + + 21 Pinoresinol + + 22 Arctigenin + + 23 Phillygenin
+ + Peak no.
Phenylethanoid glycosides like forsythoside A, forsythoside B, and lignans such as phillyrin, forsythialan A, forsythialan B, phillygenin
, and 8-hydroxypinoresinol were reported as antioxidant components of FSE (Piao et al.
Besides, the contents of phillyrin, pinoresinol glucoside and phillygenin
, the representative ingredients in lignans of weeping forsythia extract, were about 0.