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. 2021 Apr 15;9:644811. doi: 10.3389/fchem.2021.644811

Figure 9.

Figure 9

Schematic representation of in situ probe formation with hydrazone chemistry. A hydrazide ligand is reacted with an aldehyde-functionalized reactive group, for example a sulfonyl fluoride (40), to form a hydrazone probe. The resulting probe is used without further purification. Probe labeling is visualized via a copper-catalyzed click reaction with a reporter group.