Patent ID: 8133897

Claim:
A compound having the structure of formula I wherein HET is a heteroaromatic group of formula II optionally substituted on the carbon atoms of the pyrazine ring of the HET croup with up to three substituents R 7 -R 9 individually selected from the group consisting of hydrogen, C 1 -C 6 alkyl; halogen; cyano, halo(C 1 -C 6 )alkyl; aryl, alkoxy and C 1 -C 6 hydroxyalkyl, and wherein * denotes the attachment point, -L- is selected from the group consisting of —CH 2 —CH 2 —, —S—CH 2 —, —CH 2 —S— and —CH═CH—, R 1 is selected from the group consisting of H, C 1 -C 6 alkyl; C 1 -C 6 alkyl(C 3 -C 8 )cycloalkyl; C 1 -C 6 hydroxyalkyl, CH 2 CN, CH 2 C(O)NH 2 , C 1 -C 6 arylalkyl, and C 1 -C 6 alkyl-heterocycloalkyl, and R 2 -R 6 are selected individually from the group consisting of H, C 1 -C 6 alkoxy and halogen, or a pharmaceutically acceptable acid addition salt thereof.