Patent ID: 8450328

Claim:
A compound of formula (I): wherein: R 1 is phenyl or heteroaryl, wherein said phenyl or said heteroaryl group may be optionally substituted with alkyl, alkoxy, halo or —CN; R a is H or alkyl; R b is H or alkyl; or R a and R b together with the atom to which they are attached form a 3 to 8 membered saturated or partially saturated hydrocarbon ring or form a 4 to 8 membered saturated or partially saturated heterocyclic ring comprising a ring member selected from O, N(R 3 ) and S; R 2 is H, alkyl or heterocycloalkyl, wherein said alkyl may optionally be substituted with halo, alkoxy or heterocycloalkyl; provided that R 2 is selected from heterocycloalkyl and alkyl substituted by halo, alkoxy or heterocycloalkyl, when R I is furan-2-yl or 5-methyl-furan-2-yl and R a and R b are both H; R 3 is H or alkyl; wherein: heteroaryl is a 5 or 6 membered aromatic ring, comprising one or two ring members selected from N, N(R 4 ), S and O; alkyl (or the alkyl group of the alkoxy group) is a linear or branched saturated hydrocarbon containing up to 10 carbon atoms; heterocycloalkyl is a C-linked or N-linked 3 to 10 membered non-aromatic, monocyclic ring, wherein said heterocycloalkyl ring comprises 1, 2 or 3 ring members independently selected from N, N(R 4 ), S(O) q and O; R 4 is H or alkyl; q is 0, 1 or 2; or a tautomer, stereoisomer, or pharmaceutically acceptable salt thereof.