Patent ID: 8518932

Claim:
A compound having Formula I, its enantiomers, diastereoisomers, hydrates, solvates, crystal forms, tautomers or a pharmaceutically acceptable salt thereof, wherein: A is C 6-10 aryl, heterocycle, C 3-8 cycloalkyl or C 3-8 cycloalkenyl; B is C 6-10 aryl, heterocycle, C 3-8 cycloalkyl or C 3-8 cycloalkenyl; R 1 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 2 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 3 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 4 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 5 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 6 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 7 is H, halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; R 8 is halogen, —OC 1-8 alkyl, C 1-8 alkyl, CN, C(O)R 9 , NR 10 R 11 or hydroxyl; L is O, S, NH or CH 2 ; D is a group of formula “*” indicates the point of attachment to the rest of the molecule; R 9 is H or C 1-8 alkyl; R 10 is H or C 1-8 alkyl; R 11 is H or C 1-8 alkyl; and a is 0 or 1.