Department of Pharmaceutical Science, College of Pharmacy and Health Sciences, Texas Southern University, 3100 Cleburne Street, Houston, TX 77004, USA.
Molecules. 2024 Jun 21;29(13):2953. doi: 10.3390/molecules29132953.
Many phenolic C-glycosides possess nutritional benefits and pharmacological efficacies. However, the MS/MS fragmentation pattern of phenolic C-glycosides analysis is understudied. This paper aims to determine the MS/MS fragmentation patterns of phenolic C-glycosides.
Ten compounds with different sugar moieties, aglycones, and substitutes were analyzed to determine the impact of these structural features on MS/MS fragmentation using UPLC-QTOF-MS analysis.
The results showed that water loss followed by RDA reaction and alpha cleavage in the C-C bonded sugar moieties are the major fragmentation pathways. Additionally, the sugar cleavage was not affected by the skeleton and the substitute of the aglycones. These results suggested that the fragmentation patterns of phenolic C-glycosides differ from those in the O-glycosides, where the O-C glycosidic bond is the most cleavage-liable bond in MS/MS analysis.
These MS/MS fragmentation patterns can be used for the identification of C-glycosides from dietary components and herbal medicine as well as developing robust methods using MRM methods to quantify C-glycosides.
许多酚类 C-糖苷具有营养价值和药理功效。然而，酚类 C-糖苷的 MS/MS 碎裂模式分析研究较少。本文旨在确定酚类 C-糖苷的 MS/MS 碎裂模式。
使用 UPLC-QTOF-MS 分析，分析了 10 种具有不同糖部分、苷元、取代基的化合物，以确定这些结构特征对 MS/MS 碎裂的影响。
结果表明，失水后 RDA 反应和 C-C 键合糖部分的 α 裂解是主要的碎裂途径。此外，糖的裂解不受苷元骨架和取代基的影响。这些结果表明，酚类 C-糖苷的碎裂模式与 O-糖苷不同，在 MS/MS 分析中，O-C 糖苷键是最易裂解的键。
这些 MS/MS 碎裂模式可用于鉴定膳食成分和草药中的 C-糖苷，并使用 MRM 方法开发定量 C-糖苷的稳健方法。
