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- W2372625670 abstract "The fragmentation of sodiated molecules[M+Na]+of five kinds ofβ-Lactam antibiotics,including three cephalosporins and two penicillins,were studied by electrospray quadrupole time-of-flight tandem mass spectrometry(ESI-Q-TOF-MS/MS).For cephalosporins,besides the cleavage of active tetracycle,1,3-H rearrangement and retro-DielsAlder reaction(RDA)played the substantial roles in the production of many informative product ions,and the D-labeling experiments supported the postulated mechanisms.The processes of sequential losses of a CO2 and H2 S molecule from the precursor sodiated molecules for penicillins possibly involving 1,5-H rearrangement were elucidated and further confirmed by D-labeling experiment.This work enriches the fragmentation ofβ-lactam antibiotics and will be valuable for the rapid identification of untargetedβ-lactam antibiotics in the complicated matrix by mass spectrometry." @default.
- W2372625670 created "2016-06-24" @default.
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- W2372625670 date "2014-01-01" @default.
- W2372625670 modified "2023-09-24" @default.
- W2372625670 title "Study on the Cleavage Rule ofβ-Lactam Antibiotics by Electrospray Quadrupole Time-of-Flight Tandem Mass Spectrometry" @default.
- W2372625670 hasPublicationYear "2014" @default.
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