Active antibacterial substances contained in the bark of Phyllostachys heterocycla var. Pubescens were isolated by HPLC. As a result of the identification using high-resolution MS, NMR, 13C NMR, etc., 2,6-dimethoxy-p-benzoquinone was found to be an antibacterial compound in this species of bamboo. Comparison of the antibacterial spectra of benzoquinone derivatives suggested that the antibacterial activity of benzoquinones was influenced by the type of substituted group.
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