Patent ID: 8633322

Claim:
A compound of formula (I) wherein R 1 is selected from the group consisting of hydrogen, C 3-8 cycloalkyl, phenyl, benzyloxy- and piperidinyl-oxy-; is a ring structure selected from the group consisting of phenyl, naphthyl, fluorenyl, isoquinolinyl, benzofuryl, benzothiophenyl, benzo[1,3]dioxolyl and 2,3-dihydro-benzo[1,4]dioxinyl; wherein the ring structure is optionally substituted with one or more substituents independently selected from the group consisting of halogen, hydroxy, C 1-4 -alkyl, halogenated C 1-4 alkyl, C 1-4 alkoxy, halogenated C 1-4 alkoxy, (C 1-4 alkoxy)-(C 1-4 alkyl)-, (C 1-4 -alkyl)-SO 2 — and (C 1-4 alkyl)-C(O)—NH—; n is an integer selected from 0 and 1; R 2 is selected from the group consisting of C 1-4 -alkyl, C 2-4 alkenyl, C 2-4 alkynyl, hydroxy substituted C 1-4 -alkyl, NR A R B —(C 1-2 alkyl)-, cyclopropyl-methyl-, benzyl- and heteroaryl-(CH 2 ) 1-2 ; wherein R A and R B are each independently selected from hydrogen or C 1-4 -alkyl; provided that R 2 is other than t-butyl; or a pharmaceutically acceptable salt thereof.