methyl-8-{[beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosaminyl]oxy}nonanoate + GDP-beta-L-fucose = methyl 8-{[beta-D-galactosyl-(1->4)-[alpha-L-fucosyl-(1->3)]-N-acetyl-beta-D-glucosaminyl]oxy}nonanoate + GDP + H(+) — reaction