Abstract: All possible isomeric forms of a compound of the formula ##STR1## wherein A has a structure selected from the group consisting of ##STR2## wherein Y.sub.1 and Y.sub.2 are individually selected from the group consisting of hydrogen, fluorine, chlorine, bromine and alkyl of 1 to 6 carbon atoms, or Y.sub.1 and Y.sub.2 together with the carbon to which they are attached form a carbon homocycle of 3 to 7 carbon atoms and Z is selected from the group consisting of hydrogen, chlorine, bromine and iodine, Y is selected from the group consisting of hydrogen, alkyl of 1 to 18 carbon atoms unsubstituted or substituted with at least one halogen, the .beta., .alpha. bond together with Y can be part of A and and R is selected from the group consisting of non-heterocyclic primary, secondary or teritiary alcohol moiety having at least one asymetric carbon or the remainder of a substituted alcohol with a chirality due to the dissymetric spatial configuration of the entire molecule.