The present invention provides a compound of Formula (I): wherein R 1 , R 2 , R 3 and R 4 are each independently selected from a hydrogen atom, an optionally substituted C 1 -C 6 alkyl group, an optionally substituted C 7 -C 14 aralkyl group and -C(=O)Rx； Rx represents an optionally substituted C 1 -C 6 alkyl group, an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted C 1 -C 6 alkoxy group or -NReRf； Ar 1 represents an optionally substituted aromatic carbocyclic ring or an optionally mono-substituted aromatic heterocyclic ring； Q represents -(CH 2 ) m -(L) p - or -(L)p-(CH 2 ) m -； m represents an integer selected from 0 to 2, n represents an integer selected from 1 and 2, and p represents an integer selected from 0 and 1； L represents -O-, -S- or -NR 5 -； and A represents an optionally substituted aryl group or an optionally substituted heteroaryl group, a prodrug thereof and a pharmaceutically acceptable salt thereof, as well as a pharmaceutical preparation or pharmaceutical composition comprising such a compound.
