| 摘要 |
The invention provides a compound of formula (I) in which R1 and R2 are independently hydrogen, (C1-C7)-alkyl, (C2-C7)-alkenyl, or (C2-C7)-alkynyl; X1 and X2 can be independently present or absent, and if present are independently (C1-C7)-alkylene or (C2-C7)-alkenylene; Y1 and Y2 are independently (C4-C8)-cycloalkylene or (C4-C8)-cycloalkenylene, which are unsubstituted or substituted by up to four identical or different radicals selected from (C1-C7)-alkyl, (C2-C7)-alkenyl, or carboxyl; and Z is (C1-C12) - alkylene; (C2-C12)-alkenylene; D-E-F, where D and F are independently (C1-C1 2)- alkylene or (C2-C12)-alkenylene, and E is (C4-C8)-cycloalkylene or (C4-C8)- cycloalkenylene, which are unsubstituted or substituted by up to four identical or different radicals selected from (C1-C7)-alkyl or (C2-C7)- alkenyl; or G-H-I, where G and I are independently (C1-C12)-alkylene or (C2- C12)-alkenylene, and H is N-(C1-C7)-alkyl; N-(C2-C7)-alkenyl; N-(C4-C8)- cycloalkyl or N-(C4-C8)-cycloalkenyl, which are unsubstituted or substituted by up to four identical or different radicals selected from (C1-C7)-alkyl or (C2-C7)-alkenyl; or N-(C1-C7)-alkyl-(C4-C8)-cycloalkyl, which is unsubstitut ed or substituted by up to four identical or different radicals selected from ( C1- C7)-alkyl or (C2-C7)-alkenyl.
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