Abstract: The invention, in a first aspect relates to compounds of formula (I) or a pharmaceutically acceptable salt thereof, wherein R is a 6-membered aromatic ring, or a 5- or 6-membered heteroaromatic ring comprising 1 to 3 heteroatoms selected from S, O and N, or a 6-membered benzocondensed heteroaromatic ring containing N as heteroatom, optionally each of said rings being substituted with one or two substituents selected from the group consisting of (C1-C3)alkyl, (C3-C5)cycloalkyloxy, (C1-C3)alkylcarbonyl, cyano, trifluoromethyl, dimethylamino, or phenyl which optionally is substituted with one or more halogen atoms, or a 5- or 6-membered heterocycle containing from one to three nitrogen atoms; X is O or N; P is pyridyl, pyrimidyl, pyrazyl, or pyridazyl, each being optionally substituted with one or more substituents selected from the group consisting of (C1-C3)alkyl, halogen, trifluoromethyl, and cyano, and use thereof as pharmaceuticals.