Abstract：
Three new phenylpropanoids, namely (7\'R,8\'R) guaiacylglycerol 4\'-O-β-D-[6″-O-(4-O-β-D-glucopyranosyl)-p-hydroxyl-benzoyl]-glucopyranoside (1), (7 R,8R) guaiacylglycerol 8-O-1\'-(2\',6\'-dimethoxy-4\'-O-β-D-glucopyranosyl)-benzene (2), (7\'R,8\'R) guaiacylglycerol 4\'-O-β-D-[6″-O-3,5-dimethoxy-4-hydroxylbenzoyl]-gluco-pyranoside (3), along with one known phenylpropanoid (4) were isolated from the ethanol extract of Phyllostachys nigra var. henonis fresh culm. The structures of all compounds were determined by analysis of UV, 1D NMR, 2D NMR, HR-ESI-MS and CD data. All compounds were evaluated for their DPPH radical scavenging activity. Compound 2 (IC50 54.9 μM) and 3 (IC50 77.2 μM) exhibited moderate antioxidant activity compared with two positive control compounds L-ascorbic acid (IC50 15.5 μM) and 2,6-ditertbutyl-4-methyl phenol (IC50 19.1 μM).
摘要：
三种新的苯丙素类化合物，即(7'R，8\'R)愈创木酰甘油4\'-O-β-D-[6″-O-(4-O-β-D-吡喃葡萄糖基)-对羟基-苯甲酰基]-吡喃葡萄糖苷(1)，(7R,8R)愈创酰甘油8-O-1\'-(2\',6'-二甲氧基-4'-O-β-D-吡喃葡萄糖基)-苯(2)，(7\'R,8\'R)愈创酰甘油4\'-O-β-D-[6″-O-3,5-二甲氧基-4-羟基苯甲酰基]-吡喃葡萄糖苷(3)，从黑毛竹的乙醇提取物中分离出一种已知的苯丙素（4）。河豚新鲜茎。所有化合物的结构均通过UV分析确定,1DNMR,2DNMR,HR-ESI-MS和CD数据。评价所有化合物的DPPH自由基清除活性。与两种阳性对照化合物L-抗坏血酸(IC50为15.5μM)和2,6-二叔丁基-4-甲基苯酚(IC50为19.1μM)相比,化合物2(IC50为54.9μM)和3(IC50为77.2μM)表现出中等的抗氧化活性。
