摘要：

A new flavonoid, 6-carboxyl-( - )-catechin methyl ester (1) was isolated from the stem bark of Acer tegmentosum, along with six known flavonoids (2-7). The structure of compound 1 was determined by spectral analyses, including HR-ESI-MS, 1D and 2D NMR (COSY, HMQC and HMBC) experiments. From present investigation, compound 7 was isolated for the first time from the Aceraceae family.

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