Journal
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume 24, Issue 22, Pages 3325-3334Publisher
WILEY
DOI: 10.1002/rcm.4772
Keywords
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Funding
- National Natural Science Foundation of China [20805001, 90717002, 20975005]
- Scientific Research Foundation for Returning Overseas Chinese Scholars, State Education Ministry
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The fragmentation mechanisms of three types of brassinosteroids (BRs), 23,24-tris-epicastasterone, epicastasterone, tris epicastasterone, 24-epibrassinolide and 6-deoxo-24-epicastasterone, have been extensively investigated by tandem mass spectrometry (MSn, n = 1, 2, 3, 4, 5) with the assistance of high mass accuracy quadrupole time-of-flight mass spectrometry (QToF MS). The electrospray ionization (ESI) mass spectrometric fragmentation pathways of these five BRs were comprehensively elucidated for the first time. Cleavages of side chains, neutral losses of water or other molecules and opening of a ring induce the main fragmentation patterns. The results from the present study can potentially afford important guidance for the structural elucidation of different BRs and provide some fundamental data for metabolomic analysis of BRs. Copyright (C) 2010 John Wiley & Sons, Ltd.
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