| abstract |
An amide selected from the group consisting of a compound of ** formula ** wherein X is -O- or -S (O) 2-; R is a heteroaromatic ring, linked through a ring carbon atom, containing 5 to 6 members with 1 to 2 heteroatoms selected from the group consisting of oxygen, sulfur or nitrogen, aryl containing 6 or 10 carbon atoms in the ring, aryl containing from 6 to 10 carbon atoms in the ring fused with a heteroaromatic ring containing 5 or 6 ring members with 1 or 2 ring heteroatoms selected from the group consisting of nitrogen, oxygen or sulfur, or a saturated 5- or 6-membered cycloheteroalkyl ring, containing 1 to 2 heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen, or a cycloalkyl ring having 5 or 6 carbon atoms; R1 is a cycloalkyl ring with 5 or 6 carbon atoms. |