从中药陈皮中提取橙皮苷,通过酸水解制备橙皮素,再分别与苯肼类、苯甲酰肼类、苯氨基脲类、苯氨基硫脲类、苯乙酰肼类、苯氧乙酰肼类和苯氨基乙酰肼类化合物缩合得到相应的橙皮素席夫碱类化合物.用紫外、红外、核磁共振氢谱、质谱及元素分析等技术手段对化合物的结构进行了表征.测定并比较了橙皮苷、橙皮素及其席夫碱新化合物清除超氧自由基(O2-)、羟自由基(·OH)和2,2-二苯基-1-苦味酰基自由基(DPPH·)的活性及总还原能力.结果表明,在1.0 g/L时,这些化合物均具有抗氧化活性,其中部分橙皮素席夫碱化合作用强于橙皮苷和橙皮素.
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