Patent ID: 8519153

Claim:
A compound of Formula I: wherein X and Y are independently selected from halogen, OH, C 1-20 alkyl, C 2-20 alkenyl, C 2-20 alkynyl, C 1-20 alkoxy, C 2-20 alkenyloxy, C 2-20 alkynyloxy, C 3-20 cycloalkyl, C 3-20 cycloalkoxy, C 6-20 aryl and C 6-20 aryloxy; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from H, halogen, OPg, C 1-20 alkyl, C 2-20 alkenyl, C 2-20 alkynyl, C 3-20 cycloalkyl, heteroaryl, heterocyclyl and C 6-20 aryl, or any two adjacent R 1 , R 2 , R 3 , R 4 , R 5 and R 6 groups are joined together to form a 3-20 membered ring system; Pg is a suitable protecting group; R 7 is selected from C 1-20 alkyl and (CH 2 ) 2 CN; R 8 and R 9 are independently selected from C 1-20 alkyl and C 3-20 cycloalkyl; Z is selected from C 1-20 alkylene and C 6-24 arylene; and each alkyl, alkenyl, alkynyl, cycloalkyl, aryl, heteroaryl and heterocyclyl, alone or part of another group, and the ring system, is unsubstituted or substituted with one or more substituents independently selected from halogen, OPg, C 1-6 alkyl, C 1-6 alkoxy and C 6-10 aryl, or a salt or solvate thereof.