| abstract |
Compounds of the formula I wherein R 1 is hydrogen, lower alkyl, lower alkoxy, hydroxyl, amino, nitro, cyano, lower alkyl amino, di lower alkyl amino or halogen; R2 is hydrogen, lower alkyl, amino, pyrrolidin-3-ol, pyrrolidin-2-yl-methanol or -NHCH2CHROH; R3 is hydrogen or halogen; R is hydrogen, lower alkyl or -CH2OH; n is 1 or 2; and to its pharmaceutically acceptable acid addition salts. |