Piperidyl esters of phenolalkylene carboxylic acids

A member selected from the group consisting of (A) a compound of the formula ##STR15## in which R.sub.2 represents ##STR16## R.sub.1 is hydrogen or C.sub.1 -C.sub.5 -alkyl, R.sub.7 and R.sub.8 independently represent C.sub.1 -C.sub.9 -alkyl, C.sub.7 -C.sub.9 -aralkyl or C.sub.5 -C.sub.8 -cycloalkyl, R.sub.9 is hydrogen or methyl, X represents (1) hydrogen, (2) C.sub.1 -C.sub.4 alkyl, (3) allyl, (4) propargyl, (5) C.sub.2 -C.sub.6 alkoxyalkyl, (6) acetyl, (7) acryloyl, (8)crotonoyl, (9) --CH.sub.2 --COOR.sub.10 where R.sub.10 is C.sub.1 -C.sub.4 alkyl, (10) --CH.sub.2 --CH(R.sub.11)--OH where R.sub.11 is H or methyl or (11) --COOR.sub.13 where R.sub.13 is C.sub.1 to C.sub.4 alkyl, R.sub.14 is cyano, C.sub.1 -C.sub.4 alkyl, or C.sub.1 to C.sub.6 alkyl sulphonyl, R.sub.15 is (1) hydrogen, (2) 4--OH-3,5-di C.sub.1 to C.sub. 4 alkyl benzyl, (3) C.sub.1 to C.sub.12 alkyl, (4) C.sub.3 to C.sub.4 alkenyl, (5) propargyl, (6) benzyl, (7) phenyl, (8) a group of the formula ##STR17## wherein R.sub.1 and X are as previously defined, or (9) a group of the formula ##STR18## wherein R.sub.1 and X are as previously defined and R.sub.22 and R.sub.23 are H or methyl, and (B) an acid addition salt thereof with an organic or inorganic acid.