The present invention relates to compounds of formula (I) ##STR00001## wherein n represents 0, 1, 2, 3, 4 or 5 R represents independent from each other hydroxyl, cyano, nitro, halogen, alkyl, alkoxy alkylcarbonyl, alkoxycarbonyl, alkylamine, dialkylamine, alkylcarbonylamine, alkylcarbamate Y represents one of the following groups: ##STR00002## in free base or acid addition salt form, to processes for their production, their use as pharmaceuticals and to pharmaceutical compositions comprising them.