Structural analyses of carbon chains in 5-alk(en)ylresorcinols of rye and wheat whole flour by tandem mass spectrometry

被引:32
作者
Suzuki, Y [1 ]
Esumi, Y [1 ]
Uramoto, M [1 ]
Kono, Y [1 ]
Sakurai, A [1 ]
机构
[1] TAMAGAWA UNIV, TOKYO 194, JAPAN
关键词
5-alk(en)ylresorcinol; double-bond location; collision-activated dissociation; charge-remote fragmentation; tandem mass spectrometry;
D O I
10.1271/bbb.61.480
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The locations of double bonds and the linearity of each carbon chain in 5-alk(en)ylresorcinols present in rye and wheat whole flour were determined from collision-activated dissociation (CAD) spectra by tandem mass spectrometry. Among the determined alk(en)ylresorcinols, eleven alkenylresorcinols (C-17 to C-23) and four alkadienylresorcinols (C-19 to C-25) had not been previously identified. In this study, we found that identification of a radical-anion fragment peak due to a simple allylic cleavage on the methyl side was essential for determining the locations of double bonds in positionally isomeric alkenylresorcinols. In addition, an analysis of the CAD spectra of lithium-adduct cations as precursor ions was useful for determining the locations of the homoconjugated (Z,Z)-diene group in alkadienylresorcinols.
引用
收藏
页码:480 / 486
页数:7
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