Kim, HJ Lee, YS 2024-01-21T04:33:02Z 2024-01-21T04:33:02Z 2021-09-03 2005-09 0032-0943 https://pubs.kist.re.kr/handle/201004/136187 Two new dicaffeoylquinic acids, 3,5-dicaffeoyl-epi-quinic acid (1) and 1,3-dicaffeoyl-epi-quinic acid (2), were isolated from Chrysanthemum morifolium Ramar together with six known dicaffeoylquinic acid derivatives and three flavonoids. The structures of the new compounds were elucidated using of spectroscopic methods. These compounds were assessed for antioxiclant activities in the DPPH radical and superoxide anion radical scavenging systems. Most of the isolates showed strong antioxidant activities in these assay systems. Two new compounds showed potent superoxide anion radical scavenging activity (IC50 = 2.9 +/- 0.1 for 1 and 2.6 +/- 0.4 mu g/mL for 2, respectively) in the xanthine/xanthine oxidase system as compared to quercetin and also showed potent DPPH radical scavenging activity (IC50 = 5.6 +/- 0.1 for 1 and 5.8 +/- 0.2 mu g/mL for 2, respectively). English GEORG THIEME VERLAG KG QUINIC ACID FLAVONOIDS DERIVATIVES Identification of new dicaffeoylquinic acids from Chrysanthemum morifolium and their antioxidant activities Article 10.1055/s-2005-873115 1 PLANTA MEDICA, v.71, no.9, pp.871 - 876 PLANTA MEDICA 71 9 871 876 scie scopus 000232667000014 2-s2.0-27144508416 Plant Sciences Chemistry, Medicinal Integrative & Complementary Medicine Pharmacology & Pharmacy Plant Sciences Pharmacology & Pharmacy Integrative & Complementary Medicine Article QUINIC ACID FLAVONOIDS DERIVATIVES Dicaffeoylquinic acid derivatives Chrysanthemum morifolium Ramar Compositae antioxidants