Phenolics from Litchi chinensis Sonn. and Their Potential Antioxidant Effects
Xuzhe Dong
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
Yihai Wang
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
Xiangjiu He *
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
*Author to whom correspondence should be addressed.
Abstract
Aims: To research phenolics from the seed of Litchi chinensis Sonn. and estimate their antioxidant activities.
Study Design: Phenolics were isolated and determined from the seed of Litchi chinensis Sonn. Their effects on DPPH radical scavenging were investigated.
Place and Duration of Study: School of Pharmacy, Guangdong Pharmaceutical University, between September 2015 and March 2018.
Methodology: Phenolics were obtained by Silica gel, Sephadex LH-20, ODS as well as HPLC chromatography and characterized by 1D and 2D NMR. The antioxidant abilities of the isolated compounds were measured by the DPPH assay.
Results: Fifteen Phenolics were isolated and confirmed from the seed of Litchi chinensis Sonn (1–15), compounds protocatechuic acid (1), ethyl-3,4-dihydroxybenzoic acid (4), methyl p-hydroxymandelate (7), ethyl 3,4,5-trihydroxybenzoate (9) exhibited antioxidant capacities on DPPH radical scavenging.
Conclusion: This study suggests that phenolics from the seed of Litchi chinensis Sonn. showed potential antioxidant properties, which mean that lychee seed could be utilized as a natural antioxidant for health care.
Keywords: Litchi chinensis sonn, phenolics, antioxidant, dpph