LABELING REAGENTS, LABELED ANALYTES, INCLUDING MIXTURES THEREOF, AND FRAGMENT IONS DERIVED THEREFROM AND METHODS FOR THE ANALYSIS THEREOF

摘要

This invention pertains to labeling reagents, labeled analytes, including mixtures thereof, and fragment ions derived therefrom. This invention also pertains to methods for the production of labeling reagents, including N- substituted piperazine acetic acid based labeling reagents, labeled analytes , including mixtures thereof, and fragment ions derived therefrom as well as methods of the analysis of the labeled analytes.