Di-tert-butyl dicarbonate, 4-nitro-O-phenylenediamine, guanidine hydrochloride, sodium sulfate, palladium on carbon (PD/C), tetrahydrofuran, Celite® 545 AW, acryloyl chloride, trimethylamine, TFA, pyrrolidine, acetonitrile, sodium methoxide, N,N’-dimethylformamide, Dowex® 50WX8 resin, acrylamide, N,N’-methylenebisacrylamide, APS, TEMED, Lipopolysaccharide (LPS) and thiazolyl blue tetrazoliumbromide (MTT), collagen from chicken sternal cartilage, complete Freund’s Adjuvant (CFA) and incomplete Freund’s Adjuvant (IFA) were purchased from Sigma Aldrich (St. Louis, MO). Nile blue polyacrylamide was purchased from polysciences (Warrington, PA). Griess reagent kit was purchased from Invitrogen (Carlsbad, CA). DAF-2 DA was purchased from Abcam (Cambridge, MA). ELISA kits for IL-6 and TNF-α were purchased from Koma Biotech (Korea).