Chemistry of Tanning Materials and Leather Technology, National Research Centre, Dokki, Cairo, Egypt.
Pharm Biol. 2010 May;48(5):534-8. doi: 10.3109/13880200903177503.
Chemical investigations from a foliar extract of Araucaria excelsa (Lamb.) (Araucariaceae) resulted in the identification of seven phenolic metabolites including one flavananol, one flavananol 3-O-glycoside, four C-glycoside flavonoids, and one phenolic acid. Structures were elucidated by spectral determination including: UV, NMR and MS analysis. Moderate antioxidant activity was observed with a 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay in comparison with the reference antioxidant ascorbic acid.
从南洋杉（Lamb.）（南洋杉科）叶提取物的化学研究中鉴定出了七种酚类代谢物，包括一种黄烷醇、一种黄烷醇 3-O-糖苷、四种 C-糖苷类黄酮和一种酚酸。通过光谱测定（包括：UV、NMR 和 MS 分析）确定了结构。与参考抗氧化剂抗坏血酸相比，1,1-二苯基-2-苦基肼（DPPH）自由基清除试验显示出中等的抗氧化活性。
