Abstract: Compounds of the formula ##EQU1## wherein R is phenyl; phenyl having one or more substituents attached thereto, said substituents being selected from the group consisting of alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylthio of 1 to 4 carbon atoms, halogen and trifluoromethyl; a bicyclic aromatic or cycloaliphatic-aromatic ring, especially naphthyl, tetrahydronaphthyl or indanyl; or a mono- or bicyclic heterocyclic ring, especially pyridyl, pyrimidyl, isoquinolyl or thiazolyl;R.sub.1 is ##EQU2## where B is ##EQU3## n is 2, 3 or 4, R.sub.3 is hydrogen, alkyl of 1 to 4 carbon atoms or alkanoyl of 1 to 4 carbon atoms,R.sub.4 and R.sub.5, which may be identical to or different from each other, are each hydrogen or alkyl of 1 to 4 carbon atoms,p is 0 or 1, andQ is oxygen or two hydrogens,R.sub.2 is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms or halogen,A is a single carbon-to-carbon bond or --OCH.sub.2 --,R.sub.