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Molecules 2012, 17(9), 10675-10682; doi:10.3390/molecules170910675

Activity-Guided Isolation of Antioxidant Compounds from Rhizophora apiculata

 and *
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
* Author to whom correspondence should be addressed.
Received: 11 July 2012 / Revised: 24 August 2012 / Accepted: 3 September 2012 / Published: 6 September 2012
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Rhizophora apiculata (R. apiculata) contains an abundance of biologically active compounds due its special salt-tolerant living surroundings. In this study, the total phenolic content and antioxidant activities of various extract and fractions of stem of R. apiculata were investigated. Results indicated that butanol fraction possesses the highest total phenolic content (181.84 mg/g GAE/g dry extract) with strongest antioxidant abilities. Following in vitro antioxidant activity-guided phytochemical separation procedures, lyoniresinol-3α-O-β-arabinopyranoside (1), lyoniresinol-3α-O-β-rhamnoside (2), and afzelechin-3-O-L-rhamno-pyranoside (3) were separated from the butanol fraction. These compounds showed more noticeable antioxidant activity than a BHT standard in the DPPH, ABTS and hydroxyl radical scavenging assays. HPLC analysis results showed that among different plant parts, the highest content of 13 was located in the bark (0.068%, 0.066% and 0.011%, respectively). The results imply that the R. apiculata might be a potential source of natural antioxidants and 13 are antioxidant ingredients in R. apiculata.
Keywords: Rhizophora apiculata; antioxidant activity; total phenolic content; lignan; flavonol Rhizophora apiculata; antioxidant activity; total phenolic content; lignan; flavonol
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Gao, M.; Xiao, H. Activity-Guided Isolation of Antioxidant Compounds from Rhizophora apiculata. Molecules 2012, 17, 10675-10682.

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