Abstract: Compounds having formula (I) ##STR1## wherein Z is --O-- or --CH.sub.2 --; n is 1-6; R is hydrogen, C.sub.1 -C.sub.6 alkyl, phenyl or optionally substituted phenyl-C.sub.1 -C.sub.3 alkyl; R.sub.2 is C.sub.1 -C.sub.8 -alkyl, aryl-C.sub.1 -C.sub.3 alkyl, C.sub.5 -C.sub.8 cycloalkyl or C.sub.5 -C.sub.8 cycloalkyl-C.sub.1 -C.sub.3 alkyl; each of R.sub.3 and R.sub.4 independently is hydrogen or C.sub.1 -C.sub.4 alkyl, or taken together with the carbon atom to which they are linked form a C.sub.3 -C.sub.6 cycloalkyl ring; Q is --OR' or --NR'R" in which R' and R" are as herein defined, or Q is C.sub.1 -C.sub.8 alkyl, phenyl, phenyl-C.sub.1 -C.sub.3 -alkyl, C.sub.5 -C.sub.8 cycloalkyl or C.sub.5 -C.sub.8 cycloalkyl-C.sub.1 -C.sub.3 alkyl, in which both the phenyl and cycloalkyl rings or moieties are optionally substituted as herein defined; and the pharmaceutically acceptable salts thereof; are useful in particular as antidislipidaemic and antiatherosclerotic agents.