A compound having the structure wherein X is halogen, preferably fluorine or chlorine or bromine; R 1 is selected from the group consisting of H and C 1 -C 3 alkyl, wherein the alkyl optionally may be substituted one, two or three times with fluorine; R 2 is selected from the group consisting of H and C 1 -C 4 alkyl wherein the C 1 -C 4 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of phenyl, monocyclic 5- or 6-membered heteroaryl, C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; or R 2 together with R 9 and the atoms connecting them form a saturated five membered ring; R 3 is selected from the group consisting of H and C 1 -C 6 alkyl wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of phenyl, monocyclic 5- or 6-membered heteroaryl, C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; R 4 and R 5 independently of each other are selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, fluorine, chlorine, hydroxy and alkoxy of the form -OR 10 wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of phenyl, monocyclic 5- or 6-membered heteroaryl, C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; R 6 and R 7 independently of each other are selected from the group consisting of H and C 1 -C 6 alkyl wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; R 8 and R 9 independently of each other are selected from the group consisting of H and C 1 -C 6 alkyl wherein R 9, when R 9 is a C 1 -C 6 alkyl, may form a saturated aliphatic five membered ring with R 2 wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; and pharmaceutically acceptable acid addition salts of Compound I, racemic mixtures of Compound I, or the corresponding enantiomer and/or optical isomer of Compound I, and polymorphic forms of Compound I as well as tautomeric forms of Compound I. X is halogen, preferably fluorine or chlorine or bromine; R 1 is selected from the group consisting of H and C 1 -C 3 alkyl, wherein the alkyl optionally may be substituted one, two or three times with fluorine; R 2 is selected from the group consisting of H and C 1 -C 4 alkyl wherein the C 1 -C 4 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of phenyl, monocyclic 5- or 6-membered heteroaryl, C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; or R 2 together with R 9 and the atoms connecting them form a saturated five membered ring; R 3 is selected from the group consisting of H and C 1 -C 6 alkyl wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of phenyl, monocyclic 5- or 6-membered heteroaryl, C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; R 4 and R 5 independently of each other are selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, fluorine, chlorine, hydroxy and alkoxy of the form -OR 10 wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of phenyl, monocyclic 5- or 6-membered heteroaryl, C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; R 6 and R 7 independently of each other are selected from the group consisting of H and C 1 -C 6 alkyl wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl; R 8 and R 9 independently of each other are selected from the group consisting of H and C 1 -C 6 alkyl wherein R 9, when R 9 is a C 1 -C 6 alkyl, may form a saturated aliphatic five membered ring with R 2 wherein the C 1 -C 6 alkyl optionally is substituted one or more times with one or more substituents independently selected from the group consisting of C 3 -C 6 cycloalkyl, fluorine, chlorine, and alkoxy of the form -OR 10 wherein R 10 is C 1 -C 5 alkyl;