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中国药学(英文版) ›› 2014, Vol. 23 ›› Issue (9): 631-641.DOI: 10.5246/jcps.2014.09.081

• 【研究论文】 • 上一篇    下一篇

ESI-IT-TOF-MSn方法对11个异黄酮的裂解规律研究

张亚洲1,2, 徐风3, 易涛1, 张建业1, 汤依娜1, 许军1, 彭宛龄1, 陈虎彪1*   

  1. 1. 香港浸会大学 中医药学院, 香港 九龙塘 999077
    2. 贵州理工学院 制药工程学院, 贵州 贵阳 550003
    3. 北京大学医学部 天然及仿生药物国家重点实验室, 北京 100191
  • 收稿日期:2014-04-18 修回日期:2014-04-30 出版日期:2014-09-23 发布日期:2014-05-10
  • 通讯作者: Tel.: +852-34112079, Fax.: +852-34112461
  • 基金资助:
    Hong Kong Baptist University Faculty Research Foundation (Grant No. FRG2/12-13/058), and the Key Program of Guangxi Natural Science Foundation of China (Grant No. 2013-GXNSFBA019187).

Investigations of the fragmentation behavior of 11 isoflavones with ESI-IT-TOF-MSn

Yazhou Zhang1,2, Feng Xu3, Jianye Zhang1, Tao Yi1, Yina Tang1, Jun Xu1, Wanling Peng1, Hubiao Chen1*    

  1. 1. School of Chinese Medicine, Hong Kong Baptist University, Hong Kong Special Administrative Region 999077, China
    2. Guizhou College of Technology, Guiyang 550003, China
    3. State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Sciences Center, Beijing 100191, China
  • Received:2014-04-18 Revised:2014-04-30 Online:2014-09-23 Published:2014-05-10
  • Contact: Tel.: +852-34112079, Fax.: +852-34112461
  • Supported by:
    Hong Kong Baptist University Faculty Research Foundation (Grant No. FRG2/12-13/058), and the Key Program of Guangxi Natural Science Foundation of China (Grant No. 2013-GXNSFBA019187).

摘要: 本文对选定的11个异黄酮化合物在ESI-IT-TOF-MSn的裂解规律进行研究。文章采用ESI-IT-TOF-MSn仪对样品进行高分辨质谱测定, 正负离子多级切换, 通过对质谱碎片离子进行预测, 并根据结构对其质谱可能的裂解规律进行总结研究。由于在正离子模式下信号较强, 采用正离子模式对11个异黄酮多级碎片离子分析, 发现异黄酮苷的裂解主是优先断裂糖苷键; C4位羰基易于中性丢失CO (28), C环经过RDA裂解形成的A1,3+则能够比较A环与B环上的羟基取代位置;A环上有相邻羟基存在时, 也易中性丢失CO (28)H2O (18); B环有甲氧基取代时中性丢失CH4 (16)、自由基 (CH3)CH3OH (32)为常见, A环与B环有单独羟基时也偶见中性丢失CO (28)。通过ESI-IT-TOF-MSn方法, 选定多级正离子模下对异黄酮的裂解进行了总结, 有利于了解异黄酮在质谱中的裂解行为, 对于异黄酮类化合物相关的结构推测有重要意义

关键词: 异黄酮, 裂解规律, 高分辨多级质谱技术

Abstract:

The fragmentation behavior of isoflavones was studied using electrospray ionization-ion trap-time of flight mass spectrometry (ESI-IT-TOF-MSn). It was found that the isoflavone glycoside bond was easily broken. The fragmentation occurred mostly on the C-ring, and the fragment ions of A1,3+ produced bythe RDA cracking will predict the hydroxylation replacement on A-ring or B-ring. In addition, four carbonyl groups on the C-ring were fragmented through neutral loss of 28 (-CO). A and B-rings primarily lose substituents which including a neutral losses of 32 (-CH3OH), 16 (-CH4), or 16 (-O), and 18 (-H2O). A-ring in the presence of adjacent hydroxylation, also easily made to be a neutral losses of 28 (-CO) or 18 (-H2O). It is likewise common to see methoxy replaced with a neutral losses of 16 (-CH4) or 32 (-CH3OH) in B-ring, also the hydroxylation on benzene ring can occasionally results with the neutral loss of 28 (-CO).

Key words: Isoflavone, Fragmentation behavior, ESI-IT-TOF-MSn

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