Patent ID: 8912336

Claim:
A compound of a structure represented by the following formula: wherein: X 1 is S or SO 2 ; R 1 is pyridine optionally substituted with one or more R 8 ; R 4 is phenyl optionally substituted with one or more R 8 ; R 5 and R 6 are H; R 7 is selected from: H, halogen, C 1-6 alkyl, C 3-10 cycloalkyl, OC 1-6 alkyl, aryl, heteroaryl, CN or CF 3 ; R 8 is selected from: H, OH, halogen, C 1-6 alkyl, C 3-10 cycloalkyl, CN, OC 1-6 alkyl or CF 3 ; or a pharmaceutically acceptable salt thereof.