Research Article

Protective Effect of Iridoid Glycosides of the Leaves of Syringa oblata Lindl. on Dextran Sulfate Sodium-Induced Ulcerative Colitis by Inhibition of the TLR2/4/MyD88/NF-κB Signaling Pathway

Figure 1

Chemical structure of syringopicroside, the major ingredient in iridoid glycoside (IG) fraction. HPLC chromatogram of IG fraction purified using D141 macroporous adsorption resin is measured at 221 nm.