Pharmaceutical compounds

A compound which is a benzimidazole of formula (I):

• wherein:
• X is a 5-membered heteroaryl group selected from the following:
• R1 is a group which is unsubstituted or substituted and is selected from C-linked 4- to 6-membered heterocyclyl;
• C3-C6 cycloalkyl;
• C1-C6 alkyl which is unsubstituted or substituted by C6-C10 aryl, 5- to 12-membered N-containing heteroaryl, C3-C6 cycloalkyl, OH, —OC(O)R′ or OR′ wherein R′ is unsubstituted C1-C6 alkyl;
• and a spiro group of the following formula:
• Y is —CH2—, —CH2CH2— or —CH2CH2CH2—;
• n is 0 or 1;
• and
• R2 is a group selected from C6-C10 aryl, C5-C6 heteroaryl, C3-C6 cycloalkyl and C5-C6 cycloalkenyl, wherein the group is unsubstituted or substituted and wherein C6-C10 aryl is optionally fused to a 5- or 6-membered heterocyclic ring;
• or a pharmaceutically acceptable salt thereof.