CPC G01N 33/743 (2013.01) [C07D 401/06 (2013.01); C07D 413/06 (2013.01); C07J 43/003 (2013.01); G01N 33/58 (2013.01); G01N 2560/00 (2013.01)] | 7 Claims |
1. A compound of formula A:
X-L1-Z-L2-Y
wherein
X is a reactive unit, which is capable of forming a covalent bond with an analyte molecule,
L1 and L2 are independently of each other substituted or unsubstituted linker
Y is a neutral loss unit,
Z is a charged unit comprising at least one permanently charged moiety,
including any salt thereof,
wherein the reactive unit X is H2N—NH—, the neutral loss unit Y is triazole or tetrazole, and the charge unit Z comprises a piperidine unit, or
wherein the compound is selected from the group consisting of:
|