Patent ID: 8268831

Claim:
A compound of formula (I): wherein, R 1 represents hydrogen, halogen, C 1-6 alkyl or O—R′, where R′ represents hydrogen or a lower alkyl; n represents a number from 0 and 4; R 2 represents hydrogen, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, haloC 1-6 alkyl, C 3-8 cycloalkyl, C 3-8 cycloalkylC 1-3 alkyl, aryl C 1-3 alkyl or heteroaryl C 1-3 alkyl; R 3 represents hydrogen, or C 1-3 alkyl or R 2 and R 3 together represent um 3- or 4-substituintes of um ring alkyl or alkenyl; R 4 represents hydrogen, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, haloC 1-6 alkyl, C 3-8 cycloalkyl, C 3-8 cycloalkylC 1-3 alkyl or heteroaryl C 1-3 alkyl; R 5 represents hydrogen or O—R′, where R′ represents hydrogen or a lower alkyl; or enantiomers or mixtures of enantiomers or a salt thereof.