gnpl_a_1065491_sm6529.pdf (906.59 kB)
Methylenebisnicotiflorin: a rare methylene-bridged bisflavonoid glycoside from ripe Pu-er tea
journal contribution
posted on 2015-08-13, 00:00 authored by Mu-Ke Tao, Min Xu, Han Zhang, Hui Chen, Chang Liu, Hong-Tao Zhu, Dong Wang, Chong-Ren Yang, Ying-Jun ZhangA new methylene-bridged dimeric flavonol glycoside, methylenebisnicotiflorin (1), was isolated from ripe Pu-er tea, along with 10 known flavonoids (2–11) and seven known phenolic compounds (12–18). The structure elucidation was based on spectroscopic analysis. Among them, 1,3-dihydroxyphenyl-2-O-sulfate (13), 2,3,4-trihydroxybenzoic acid (16) and 3,3′,4,4′-tetrahydroxybiphenyl (18) are reported from tea plants for the first time.