Compounds are disclosed of formula:R.sub.1 --(CH.sub.2).sub.n --Hetin which R.sub.1 represents a residue of formula ##STR1## X represents a hydrogen atom or an alkyl radical, Y represents a hydrogen atom or an alkyl or alkoxy radical,Z represents an alkyl radical,n is equal to 2 or 3,Het represents a substituted piperidino (substituted at the 4-position with a 1-indenylidene, 1-indenyl or 1-indanyl radical or with a chain --(CH.sub.2).sub.m --R.sub.2 or .dbd.CH--R.sub.2), substituted 1,2,3,6-tetrahydro-1-pyridyl (substituted at the 4-position with a chain --(CH.sub.2).sub.m --R.sub.2),m is equal to 1 or 2, andR.sub.2 represents an optionally substituted 2- or 3-indolyl radical, a 1- or 2-indanyl, 1- or 2-indenyl, an optionally substituted 1,2,3,4-tetrahydro-5H-pyrido[4,3-b]indol-2-yl radical, a 1,2,3,4-tetrahydro-3-quinolyl radical, an optionally substituted 1,2,3,4-tetrahydro-2-naphthyl radical or a 1-indolyl radical, their preparation and medicinal products containing them.