葱皮忍冬为忍冬科忍冬属植物Lonicerafer－dinandiiFranch.的叶，是陕西地方民间习用草药，具有清热解毒、抗菌消炎等作用［1］。从其叶的乙醇提取物中分得单体化合物2，3－quinoxali－ne，1，4-dihydro，在国外作为一种抗氧化剂，能增加聚氧树脂在高温条件下的抗氧化作用（2， The onion skin honeysuckle is the leaf of the honeysuckle plant Lonicerafer-dinandii Franch. It is a local folk herb used in Shaanxi Province and has the functions of detoxification, antibacterial and anti-inflammatory [1]. The monomeric compound 2,3-quinoxali-ne,1,4-dihydro was isolated from the ethanol extract of its leaves and used as an antioxidant abroad to increase the antioxidant activity of the polyoxymethylene resin at high temperatures (2 ,