Compounds of ** formula ** wherein X is a single bond or an ethinediyl group; wherein in case X is a single bond, R1 is cyano, halogen, C1-C7 alkyl, C3-C6-cycloalkyl, C1-C7 alkoxy, fluoro-C1-C7 alkoxy, fluoro-C1-C7 alkyl, or is pyrrole -1-yl, which is not substituted or substituted by one to three substituents selected from the group consisting of fluoro, chloro, cyano, - (CH2) 1-4-hydroxyl, fluoro-C1-C7 alkyl, C1-C7 alkyl, - (CH2) n-C1-C7 alkoxy, - (CH2) nC (O) OR¿ ¿, - (CH2) 1-4-NR¿R¿¿, hydroxy-C1-C7 alkoxy and - (CH2) n- CONR¿R¿¿, or is it phenyl, which is not substituted or substituted by one or two substituents selected from the group consisting of halogen, alkyl 1, fluoro-alkyl 1, C1-C7 alkoxy, fluoro-C1-C7 alkoxy and cyano ; and to its pharmaceutically acceptable addition salts.
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