| abstract |
Compounds of formula (I) ** (See formula) ** where R1 is - (CRR ') n-aryl, - (CRR') n-heteroaryl, - (CRR ') nO-aryl or - (CRR') nO -heteroaryl, where the aryl or heteroaryl groups are unsubstituted or substituted with one or two substituents chosen from the group consisting of halogen, lower alkyl, lower alkoxy, lower alkyl substituted by halogen, or substituted or unsubstituted phenyl, so that the substitution in the phenyl group it can be lower alkyl or halogen, or it is - (CRR ') n2-benzo- [1.3] dioxolyl; R / R 'are independently of one another hydrogen, lower alkyl or together form a cycloalkyl group with the carbon atom to which they are attached; R2 / R3 are independently of each other hydrogen, lower alkyl, phenyl or cycloalkyl, or may together form a five or six membered heterocycle with the N atom to which they are attached; n is 0 or 1; and its pharmaceutically acceptable acid addition salts. |