Abstract: Compounds I (R1 is an optionally substituted C1-C13 heteromonocyclic, heterobicyclic or heterotricyclic group containing from 1 to 5 heteroatoms selected from N, O and S; R2 is H, an optionally substituted monocyclic aromatic group, or a C1-C5 heteroaromatic group containing from 1 to 4 heteroatoms selected from N, O and S; R3 is an optionally substituted C1-C13 heteromonocyclic, heterobicyclic or heterotricyclic group containing from 1 to 5 heteroatoms selected from N, O and S; an optionally substituted mono-, bi- or tricyclic C6-C14 aryl group, an optionally substituted C3-C6 cycloalkyl group, or an optionally substituted C3-C6 cycloalkenyl group; each R4, independently for each position capable of substitution, is H or C1-C6 alkyl; R5 is H, halogen or C1-C6 alkyl; m is 0, 1 or 2; n is 0, 1 or 2; p is 0, 1, 2, 3, 4, 5, or 6; and is an optional double bond) and their enantiomers, diastereomers, N-oxides and pharmaceutically acceptable salts, and pharmaceutical compositions containing them, are useful f