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本文报导了描爪草有效成份RT－A2的EI谱。RT－A2对肿瘤坏死因子（TNF）有较强的诱生作用。RT－A2的分子式被推断为n－C15H31COOH，并讨论了特征碎片离子可能裂解方式。
This paper reports the EI spectrum of Actinidia deliciosa RT-A2. RT-A2 has a strong inducing effect on tumor necrosis factor (TNF). The molecular formula of RT-A2 is inferred to be n-C15H31COOH and the possible fragmentation of the characteristic fragment ions is discussed.