Patent: Protecting Groups Useful in the Synthesis of Polysaccharides, Natural products and Combinatorial Libraries. 23Patent Authors: Buchwald, S.L.; Plante, O.J.; Seeberger, P.H. U.S. Patent No. 6,693,178Date Issued: February, 17, 2004Patent Title: Protecting Groups Useful in the Synthesis of Polysaccharides, Natural products and Combinatorial Libraries.