Chemical and biological perspectives of ellagitannin oligomers from medicinal plants

摘要: Abstract The phytoehemical study of hydrolyzable tannins, naturally occurring complex polyphenols, has been facilitated by recent developments in modern analytical and spectroscopic techniques. Among numerous tannins characterized during the last two decades, those classified as oligomeric ellagitannins have attracted widespread attention to their diverse structures biological activities including antioxidative, antitumor antiviral effects. We describe herein molecular representative general methods for extraction, separation, structural elucidation based on MS, NMR CD spectra. Biological specific each oligomer structure are also summarized.