Planta Med 2005; 71(9): 871-876
DOI: 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
Further Information

Publication History

Received: November 10, 2004

Accepted: April 25, 2005

Publication Date:
19 September 2005 (online)

Preview

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).

References

Dr. Yong Sup Lee

Department of Pharmaceutical Science

College of Pharmacy

Kyung Hee University

1 Hoegi-Dong

Dongdaemoon-Ku

Seoul 130-701

Korea

Phone: +82-2-961-0370

Fax: +82-2-966-3885

Email: kyslee@khu.ac.kr