A compound having the formula (I) wherein ring A represents a substituted or unsubstituted monocyclic or multicyclic ring; m=any positive integer; n=0-5; X=CH and Y=--C(O)NR.sup.1R.sup.2, --NR.sup.1R.sup.2 or --S(O).sub.2R.sup.4, where R.sup.1, R.sup.2 and R.sup.4 are each individually selected from the group consisting of H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted amine, substituted or unsubstituted carbocyclic ring, substituted or unsubstituted heterocyclic ring, or any combination thereof, or R.sup.1 and R.sup.2 are linked so as to form part of a substituted or unsubstituted heterocyclic ring, or X=N and Y=--S(O).sub.2R.sup.3 or --C(O)R.sup.3, where R.sup.3 is selected from the group consisting of H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted amine, substituted or unsubstituted carbocyclic ring, substituted or unsubstituted heterocyclic ring or any combination thereof. ##STR00001##