5-thioxylopyranose compounds

A thioxylose compound selected from the group consisting of:

• a) compounds of formula I:
• wherein:
• the pentapyranosyl group represents a 5-thio-β-D-xylopyranosyl group,
• R represents a hydrogen atom or a C2-C6 acyl group,
• R′ and R″ each independently represent a hydrogen atom, a halogen atom or a C1-C4 alkyl group, and
• A represents a 5- or 6-membered aromatic ring of formula:
• wherein:
• X represents a nitrogen, oxygen or sulfur atom,
• Y represents a carbon atom or a single bond,
• Z1, Z2 and Z3 each independently represent a carbon or nitrogen atom, and
• R1, R2 and R3 each independently represent a hydrogen atom, a halogen atom, a cyano group, a C1-C4 alkyl group, a hydroxyl group, a C1-C4 alkoxy group, a trifluoromethyl group or a dialkylamino group;
• or
• R1 and R2 together with the atoms of the heterocycle to which they are attached form an aromatic ring comprising 6 carbon atoms, whereby A represents a fused bicyclic group,
• b) addition salts thereof.