Patent ID: 7074822

Claim:
A compound corresponding to formula I, wherein R 1 is C 1-18 -alkyl, one or two alkyl-chain carbon atoms of which are optionally replaced by oxygen or sulfur; phenyl-C 0-18 -alkyl, the phenyl group of which is optionally substituted one or two times by halogen, trifluoromethyl, nitro, C 1-8 -alkyl, C 1-8 -alkoxy, C 1-6 -alkylcarbonyl, C 1-6 -alkoxycarbonyl, phenyl, benzyl or phenoxy, and one or two alkyl-chain carbon atoms of which are optionally replaced by oxygen or sulfur; C 3-7 -cycloalkyl-C 0-18 -alkyl, one or two alkyl-chain carbon atoms of which are optionally replaced by oxygen or sulfur, or benzoyl; R 2 is C 1-12 -alkyl, one or two alkyl-chain carbon atoms of which are optionally replaced by oxygen or sulfur; phenyl-C 1-18 -alkyl, the phenyl group of which is optionally substituted once or twice by halogen, C 1-4 -alkyl, C 1-4 -alkoxy, benzyl or phenoxy, and one or two alkyl-chain carbon atoms of which are optionally replaced by oxygen or sulfur; or C 3-7 -cycloalkyl-C 0-18 -alkyl, one or two alkyl-chain carbon atoms of which are optionally replaced by oxygen or sulfur, and n is a whole number from 2 to 8.