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Search Publications by: Quan-Long Pu (Fed)

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Displaying 1 - 3 of 3

Characterization of the trimethyl silyl derivatives of 6-Amino-3-methyl-1,4-diphenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile and its analogs by electron ionization gas chromatography/mass spectrometry

June 27, 2025
Author(s)
Quan-Long Pu, Yufang Zheng, Edward P. Erisman
Pyranopyrazoles have broad applications as pharmaceutical ingredients and biodegradable agrochemicals. The most extensively investigated are the pyrano[2,3 c]pyrazoles, with new synthetic products continually emerging. Gas chromatography/mass spectrometry

Consecutive Neutral Losses of H 2 O and C 2 H 4 O From N-Terminal Thr-Thr and Thr-Ser in Collision-Induced Dissociation of Protonated Peptides. Position Dependent Water Loss From Single Thr or Ser.

November 1, 2007
Author(s)
Pedatsur Neta, Quan-Long Pu, Xiaoyu Yang, Stephen E. Stein
A two-step neutral loss from tryptic peptides containing Thr-Thr or Thr-Ser at their N-terminus is studied. This process also requires a mobile proton (i.e., the number of charges on the peptide is greater than the number of basic amino acids) and leads to
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