| abstract |
The invention provides a compound for use in the treatment of an autoimmune disease such as multiple sclerosis, the compound being a compound of the formula (1) or a salt, solvate, N-oxide or tautomer thereof; wherein a is 0 or 1; b is 0 or 1 : provided that the sum of a and b is 0 or 1; T is O or NH; Ar 1 is an optionally substituted monocyclic or bicyclic 5- to 10-membered aryl or heteroaryl group; and Ar 2 is an optionally substituted monocyclic or bicyclic 5- to 10-membered aryl or heteroaryl group; provided that, when b is 0, a carbon atom of Ar 2 is attached directly to the 5-membered ring containing the moiety T. |