Planta Medica, Table of Contents Planta Med 2005; 71(9): 871-876DOI: 10.1055/s-2005-873115 Original Paper Natural Product Chemistry © Georg Thieme Verlag KG Stuttgart · New York Identification of New Dicaffeoylquinic Acids from Chrysanthemum morifolium and their Antioxidant Activities Hyoung Ja Kim1 , 2 , Yong Sup Lee2 1Medicinal Chemistry Research Center, Division of Life Sciences, Korea Institute of Science & Technology, Cheongryang, Seoul, Korea 2Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Dongdaemoon-Ku, Seoul, Korea Recommend Article Abstract Buy Article Corrected by: Identification of New Dicaffeoylquinic Acids from Chrysanthemum morifolium and their Antioxidant ActivitiesPlanta Med 2005; 71(10): 990-990DOI: 10.1055/s-2005-916183 Abstract 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 antioxidant 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 μg/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 μg/mL for 2, respectively). Key words Dicaffeoylquinic acid derivatives - Chrysanthemum morifolium Ramar - Compositae - antioxidants Full Text References References 1 Jung H A, Park J C, Chung H Y, Kim J, Choi J S. Antioxidant flavonoids and chlorogenic acid from the leaves of Eriobotrya japonica . Arch Pharm Res. 1999; 22 213-8 2 Miyake Y, Shimoi K, Kumazawa S, Yamamoto K, Kinae N, Osawa T. 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