Further use of O-(2,3,4-tri-O-acetyl-alpha-L-fucopyranosyl)-(1----3)-O-(2-acetamido-4 ,6-di-O- acetyl-2-deoxy-beta-D-glucopyranosyl)-(1----3)-2,4,6-tri-O-acetyl-a lph a-D- galactopyranosyl bromide as a glycosyl donor. Synthesis of two mucin-type tetrasaccharides. 1988