The trisaccharides GlcNAc beta 1-6(GlcNAc beta 1-3)GalNAc alpha OR and GlcN
Ac beta 1-6(Gal beta 1-3)GalNAc alpha OR, and disaccharides GlcN-Ac beta 1-
3GalNAc alpha OR and GlcNAc beta 1-6GalNAc alpha OR as spacered derivatives
(R = CH2CH2CH2NH2) were synthesised using a Troc-protected glucosamine gly
cosyl donor at the key stage.