abstract |
Compounds of formula (I): ** (See formula) ** where R1 and R2, together with the nitrogen atom to which they are attached, form a monocyclic saturated heterocyclic ring of 4, 5, 6 or 7 members, which may optionally carry one or two more independently chosen heteroatoms between O, N and S; R3 is hydrogen, halogen, lower alkyl or cyano; R4 and R5 are independently halogen; and X is -C (O) -o -SO2-; and where &8220; lower alkyl &8221; refers to a branched or straight chain monovalent alkyl radical of one to eight carbon atoms; or a pharmaceutically acceptable salt thereof. |