title: Anthocyanins from new red leaf tea 'Sunrouge'.
abstract: New red leaf tea cultivar 'Sunrouge' (Camellia taliensis × Camellia sinensis), for which an application for registration was made in 2009, is an anthocyanin-rich tea. The anthocyanin content of 'Sunrouge' was the highest among 4 tea cultivars, and was 8.4 times higher than that of 'Yabukita'. We purified and isolated 6 anthocyanins from 'Sunrouge' by chromatography, and identified them by LC/MS/MS and NMR analysis. As a result, the four anthocyanins were identified as delphinidin-3-O-β-D-(6-(E)-p-coumaroyl)galactopyranoside (2), delphinidin-3-O-β-D-(6-(E)-p-coumaroyl)glucopyranoside (3), cyanidin-3-O-β-D-(6-(E)-p-coumaroyl)galactopyranoside (4), and cyanidin-3-O-β-D-(6-(E)-p-coumaroyl)glucopyranoside (5), and the other two were estimated as delphinidin-(Z)-p-coumaroylgalactopyranoside (1), petunidin-(E)-p-coumaroylgalactopyranoside (6). Compound 3 was found in tea for the first time. In general, anthocyanins have various bioactivities, including relieving eyestrain and antioxidative effects, so it is expected that drinking 'Sunrouge' tea brings in similar bioactivities.
authors.affiliation: Research Laboratory for Fundamental Technology of Food, Asahi Breweries, Ltd., Ibaraki, Japan. takeshi.saito@asahibeer.co.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Saito
authors.forename: Daiki
authors.initials: D
authors.lastname: Honma
authors.forename: Motoyuki
authors.initials: M
authors.lastname: Tagashira
authors.forename: Tomomasa
authors.initials: T
authors.lastname: Kanda
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nesumi
authors.forename: Mari
authors.initials: M
authors.lastname: Maeda-Yamamoto
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D028244:Camellia / Q000737:chemistry*; D013058:Mass Spectrometry; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D013662:Tea / Q000737:chemistry*
chemical_list: D000872:Anthocyanins; D013662:Tea