Patent ID: 7906659

Claim:
An oxacarbocyclic fumaric acid oligomer of the following formula (IV) wherein the radicals R 1 and R 2 are the same or different and are independently chosen from amine radicals (—NR 3 R 4 ), amino acid radicals (—NH—CH(COOH)-R 6 ), peptide radicals having 2 to 100 amino acids, alcohol radicals (—OR 5 ) and a hydroxyl radical, n is an integer from 2 to 10, the radicals R 3 and R 4 are the same or different and are independently chosen from hydrogen, C 1-24 alkyl radicals, a phenyl radical and C 6-10 aralkyl radicals, the radical R 5 is chosen from hydrogen, C 1-24 alkyl radicals, a phenyl radical and C 6-10 aralkyl radicals, and the radical R 6 represents a side chain of a natural or synthetic amino acid.