Formation and structure elucidation of N-(2,3,4-tri-O-acetyl-β-d-glucopyranosyl)-N′-acetylthiourea

Treatment with concd HCl/MeOH transformed N-(tetra-O-acetyl-β-d-glucopyranosyl)-N′-acetylthiourea, via selective cleavage of the primary alcoholic ester group, into the title compound.