| 摘要 |
The invention relates to compounds of the formula (I),in which the symbols have the following meaning:R(1) is1. alkyl having 1, 2, 3, 4, 5, 6, 7 or 8 carbon atoms;2. alkyl having 1, 2, 3, 4, 5, 6, 7 or 8 carbon atoms, in which one to all hydrogen atoms are replaced by fluorine;3. alkenyl having 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 carbon atoms; or4. -CnH2n-nn-Y,nn is zero or 2; andn is zero, 1, 2, 3 or 4; where n is unequal to zero or 1 if nn is equal to 2;5. -CnH2n-nn-Y,nn is zero or 2; andn is 1, 2, 3 or 4; where n is unequal to 1 if nn is equal to 2. |
