| abstract |
Compound represented by the general formula II or III: wherein: X is O or C (R 2 ) 2 ; Y is [C (R 2 ) 2 ] c ; A is NR 2 or not present; R 1 is independently selected from the group consisting of halo, hydroxy, nitro, cyano, hydrocarbyl and substituted hydrocarbyl radicals, which substituted hydrocarbyl may be substituted with heteroatoms selected from the group consisting of halogen, nitrogen, phosphorus, sulfur and oxygen ; R 2 is selected from the group consisting of hydrogen, C 1-8 alkyl, (CR 8 R 9 ) d C (O) OR 10 , COCH 3 , CH 2 CH 2 OH, CH 2 CH 2 CH 2 OH and phenyl; R is selected from the group consisting of halogen, hydrocarbyl, and substituted hydrocarbyl radicals wherein the substituted hydrocarbyl may be substituted with heteroatom selected from the group consisting of halogen, nitrogen, phosphorus, sulfur, and oxygen; R 3 and R 4 are independently selected from the group consisting of hydrogen, hydrocarbyl, and substituted hydrocarbyl radicals wherein the substituted hydrocarbyl may be substituted with heteroatoms selected from the group consisting of: |