Das Jayashankar, Mao Ashiho A, Handique Pratap J
Department of Biotechnology, Gauhati University, Guwahati-781 084, India.
Nat Prod Commun. 2011 Jan;6(1):129-32.
The volatile constituents of Valeriana jatamansi Jones and V. hardwickii Wall. (Valerianaceae) collected from the Khasi Hills of north-east India were analyzed by GC and GC/MS. Twenty-seven and twenty-one compounds were characterized and identified from V. jatamansi and V. hardwickii samples, representing 90.6% and 82.7% of the total oil, respectively. Sesquiterpenes were shown to be the main constituents in both the oil samples. Maaliol (26.1%), patchouli alcohol (9.3%) and a-gurjunene (8.7%) were the major components of V. jatamansi oil, whereas valeracetate (21.3%), methyl linoleate (14.1%), bornyl acetate (13.8%) and cuparene (7.1%) were the main constituents of V. hardwickii oil. Both Indian valerian essential oils were studied for their antioxidant activities using the free radical-scavanging activity (DPPH) and ferric reducing antioxidant power (FRAP) assays. V. hardwickii oil exhibited a higher antioxidant capacity than V. jatamansi in both assays. For both the valerian oil samples, there was a concentration-dependent increase in free radical scavenging activity and ferric reducing capacity. Both valerian oils and their ingredients are potential sources of natural antioxidants.
对采自印度东北部卡西丘陵地区的阔叶缬草（Valeriana jatamansi Jones）和哈氏缬草（V. hardwickii Wall.）（缬草科）的挥发性成分进行了气相色谱（GC）和气相色谱-质谱联用（GC/MS）分析。从阔叶缬草和哈氏缬草样品中分别鉴定出27种和21种化合物，分别占总油含量的90.6%和82.7%。倍半萜类化合物被证明是两种油样中的主要成分。玛珥醇（26.1%）、广藿香醇（9.3%）和α-古芸烯（8.7%）是阔叶缬草油的主要成分，而乙酸戊酯（21.3%）、亚油酸甲酯（14.1%）、乙酸龙脑酯（13.8%）和库帕烯（7.1%）是哈氏缬草油的主要成分。采用自由基清除活性（DPPH）和铁还原抗氧化能力（FRAP）测定法对两种印度缬草精油的抗氧化活性进行了研究。在这两种测定法中，哈氏缬草油均比阔叶缬草表现出更高的抗氧化能力。对于两种缬草油样品，自由基清除活性和铁还原能力均呈现浓度依赖性增加。两种缬草油及其成分都是天然抗氧化剂的潜在来源。
