Patent ID: 7368479

Claim:
A compound of the general formula including the optical isomers thereof and mixtures of such isomers, wherein Ar 1 and Ar 2 independently of each other stand for an optionally substituted phenyl group, R 1 and R 2 stand independently of each other for hydrogen, optionally substituted C 1 -C 5 alkyl, optionally substituted C 2 -C 5 alkenyl, C 2 -C 5 alkynyl or optionally substituted C 3 -C 6 cycloalkyl; R 3 designates hydrogen, C 3 -C 5 alkenyl, C 3 -C 5 alkynyl or optionally substituted C 1 -C 5 alkyl; R 4 is optionally substituted C 1 -C 5 alkyl, optionally substituted C 2 -C 5 alkenyl, C 2 -C 5 alkynyl or optionally substituted C 3 -C 6 cycloalkyl; R 5 and R 6 are independently of each other hydrogen or optionally substituted C 1 -C 5 alkyl, optionally substituted C 2 -C 5 alkenyl, C 2 -C 5 alkynyl or optionally substituted C 3 -C 6 cycloalkyl; R 7 and R 8 are independently of each other hydrogen or optionally substituted C 1 -C 5 alkyl, optionally substituted C 2 -C 5 alkenyl, C 2 -C 5 alkynyl or optionally substituted C 3 -C 6 cycloalkyl; W designates a bridge selected from —O—, —S(O) m — or —NR 3 —; X designates a direct bond or a bridge selected from —O—, —S(O) m — or —NR 3 —; a and b independently of each other stand for a number 1, 2 or 3; and c and m independently of each other stand for a number zero, 1 or 2.