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Takasaki, Midori; Kuroki, Satoshi; Kozuka, Mutsuo; Konoshima, Takao
Journal of natural products (Washington, D.C.), 10/2001, Letnik: 64, Številka: 10Journal Article
Four new phenylpropanoid esters of sucrose, lapathosides A (1), B (2), C (3), and D (4), were isolated from the aerial parts of Polygonum lapathifolium together with known esters, vanicoside B (5) and hydropiperoside (6). The structures of 1−4 were determined by spectral (1D and 2D NMR and MS) analysis. Lapathoside A (1) and vanicoside B (2) showed significant inhibitory effects on the Epstein−Barr virus early antigen activation by tumor-promoters.
