作者:Tao Yuan、Chunpeng Wan、Ke Liu、Navindra P. Seeram
DOI:10.1016/j.tet.2011.11.062
日期:2012.1
Four new gallotannins, maplexins F–I (1–4), two new phenolic glycosides, rubrumosides A–B (5,6), and eleven known compounds were isolated from red maple (Acer rubrum) bark. Their structures were elucidated based on spectroscopic analysis. The maplexins contained three galloylated derivatives attached to different positions of 1,5-anhydro-glucitol and were 10–20 fold more potent α-glucosidase inhibitors
四个新的棓单宁,maplexins F-I(1 - 4),两个新的酚苷,rubrumosides A-B(5,6),和11已知的化合物,分别从红色枫木(隔绝宏基癣菌)的树皮。根据光谱分析阐明了它们的结构。Maplexins包含三个分别连接到1,5-脱水葡萄糖醇不同位置的没食子酸酯化衍生物,并且是有效的α-葡萄糖苷酶抑制剂的10-20倍,比临床药物阿卡波糖(IC 50= 7–16 vs 161μM),体外。这些结果支持了以前的数据,表明gallotannins是枫树植物部分提取物的α-葡萄糖苷酶抑制活性的主要贡献者,并且1,5-脱水葡萄糖醇部分上的三个取代基对于活性很重要。