Patent ID: 8436205

Claim:
A compound of formula (I) wherein R 1 represents hydrogen or fluorine; R 2 represents hydrogen, or —CO—R 21 ; R 21 represents (C 1-5 )alkyl, (C 1-3 )fluoroalkyl, (C 3-6 )cycloalkyl, (C 3-6 )cycloalkyl-(C 1-3 )alkyl, (C 1-5 )alkoxy, (C 1-2 )alkoxy-(C 1-3 )alkyl, or R 22 R 23 N—; R 22 represents (C 1-5 )alkyl; R 23 represents hydrogen, or (C 1-5 )alkyl; n represents the integer 1, 2, 3, or 4; m represents the integer 2, 3, 4, or 5; R 3 represents hydrogen, (C 1-5 )alkyl, or (C 1-3 )fluoroalkyl; R 4 represents (C 1-3 )fluoroalkyl which is optionally mono-substituted with phenyl; R 5 represents (C 1-5 )alkyl, which is unsubstituted, mono-, or di-substituted, wherein each substituent is independently selected from the group consisting of hydroxy, (C 1-2 )alkoxy, (C 1-2 )alkoxy-(C 1-3 )alkoxy, hydroxy-(C 2-4 )alkoxy, aryl-(C 1-3 )alkoxy, and aryl-(C 1-2 )alkoxy-(C 1-3 )alkoxy; or R 5 represents (C 1-5 )alkyl, which is di-substituted, wherein one substituent is (C 1-2 )alkoxy and the other is phenyl; or R 5 represents a saturated four- to eight-membered carbon ring optionally containing two oxygen ring atoms, whereby the two oxygen ring atoms are not adjacent to each other; in a free or a salt form.