Patent ID: 7964727

Claim:
A compound of the formula (I): wherein Het represents a heterocyclic group having one nitrogen atom, to which B binds directly to said nitrogen atom, and from 4 to 7 carbon atoms, and said heterocyclic group being unsubstituted or substituted by 1 to 4 substituents independently selected from the group consisting of substituents α 1 ; A represents an alkylene group having from 1 to 4 carbon atoms; B represents a methylene group; R 1 represents an isopropyl group, an n-propyl group or a cyclopentyl group; R 2 represents a methyl group; R 3 independently represents 1,4-dihydroxycyclohexyl or hydroxytetrahydropyranyl; said substituents α 1 are independently selected from the group consisting of a hydroxyl group an amino group; and n is 1; or a pharmaceutically acceptable salt thereof.