| 摘要 |
The compounds are esters having the formula <IMAGE> wherein R1 and R2 are each independently alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R3 is the group <IMAGE> R4 is hydrogen, alkyl, cycloalkyl or alpha -methylbenzyl, R5 is alkyl or cycloalkyl, R6 is hydrogen or alkyl and, provided when R4 is hydrogen, R6 is alkyl and R5 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.
|
