1,3,4,6-Tetra-O-acetyl-N-azidoacetylmannosamine，ManNAz tetraacetate

Ac4ManNAz is a novel probe for metabolic labeling of sialoglycans, selectively imaging polysialic acids in neurons.

1,3,4,6-Tetra-O-acetyl-N-azidoacetylmannosamine, also called ManNAz tetraacetate, 1,3,4,6-tetra-O-acetyl-N-azidoacetyl-D-mannosamine and Ac4ManNAz, is an azide-containing metabolic glycoprotein labelling reagent that can be incorporated into the sialic acid biosynthesis pathway. The azide is able to react with an alkyne in a 1,3-dipolar cycloaddition reaction (click chemistry) to enable linking to a fluorescent probe or a biotin.