Patent ID: 8349548

Claim:
A compound of the formula I wherein A 1 is A 2 is A 3 is A 4 is w, x, y and z independently of each other are an integer from 0-4, provided that the sum of w+x+y+z is an integer from 2-4, corresponding to the valency of Q; and provided that, when more than one A 1 or more than one A 2 or more than one A 3 or more than one A 4 is present in the compound of the formula I, said multiple A 1 , multiple A 2 , multiple A 3 and multiple A 4 can be different from any other A 1 , A 2 , A 3 , or A 4 ; x is 0, 1 or 2; y is 0, 1, 2 or 3; z is 0 or 2; w is 0 or 1; M 1 is no bond; M 2 and M 3 independently of each other are no bond or a single bond; M 4 is CO; Y is S; Q is a C 2 -C 10 alkylene, S—C 2 -C 10 alkylene-S or S-alkanetriyl which is interrupted by CO and O; R 1 is C 1 -C 4 alkyl; R 2 is C 1 -C 4 alkyl or C 1 -C 20 heteroaryl; R″ 2 is C 1 -C 20 heteroaryl; R 3 , R 4 , R′ 3 , R′ 4 , R″ 3 and R″ 4 are hydrogen; R 5 is or (CO)R 15; R 15 is C 1 -C 20 heteroaryl; R 24 is a direct bond, phenylene, or phenylene-O; provided that at least two oxime ester groups are present in at least one of the groups A 1 , A 2 , A 3 or A 4 .