6′-O-Caffeoyldihydrosyringin isolated from Aster glehni suppresses lipopolysaccharide-induced iNOS, COX-2, TNF-α, IL-1β and IL-6 expression via NF-κB and AP-1 inactivation in RAW 264.7 macrophages - Seo, S; Lee, K G; Shin, J S; Chung, E K; Lee, J Y; Kim, H J; Lee, K T (Bioorg Med Chem Lett, 2016)