| 摘要 |
The compounds are esters and amides of trialkylhydroxyphenylalkanoic acid having the formula <IMAGE> <IMAGE> wherein R, R1 and R2 are independently lower alkyl or cycloalkyl groups, R3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R4 is hydrogen, lower alkyl, cycloalkyl, R5 is hydrogen, alkyl, phenyl, phenyl substituted with alkyl groups, alkylene, polyoxyalkylene or polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene, m is 1 to 4 and n is 1 to 6.
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