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2. See for example: Meldal, M. Glycopeptide Synthesis. In Neoglycoconjugates: Preparation and Applications; Lee, Y. C.; Lee, R. T., Eds. Academic Press, Inc.: San Diego, 1994, pp. 145–198; Paulsen, H. Angew. Chem., Int. Ed. Engl. 1990, 29, 823–839; Kunz, H. Angew. Chem., Int. Ed. Engl. 1987, 26, 294–308.
3. For a recent review of the synthesis of O-linked glycopeptides see: Arsequell, G.; Valencia, G. Tetrahedron: Asymmetry 1997, 8, 2839–2876.
4. For some recent examples see: Coutrot, P.; Grison, C.; Coutrot, F. Synlett 1998, 393–395; Urban, D.; Skrydstrup, T.; Beau, J.-M. J. Chem. Soc., Chem. Commun. 1998, 955–956; Burkhart, F.; Hoffmann, M.; Kessler, H. Angew. Chem. Int., Ed. Engl. 1997, 36, 1191–1192 and references contained therein; Lay, L.; Meldal, M.; Nicotra, F.; Panza, L.; Russo, G. J. Chem. Soc., Chem. Commun. 1997, 1469–1470; Debenham, S. D.; Debenham J. S.; Burk, M. J.; Toone, E. J. J. Am. Chem. Soc. 1997, 119, 9897–9898.
5. See for example: Rodriguez, R. E.; Rodriguez, F. D.; Sacristán, M. P.; Torres, J. L.; Valencia, G.; Garcia Antón, J. M. Neurosci. Lett. 1989, 101, 89–94; Polt, R.; Porecca, F.; Szabo, L.; Hruby, V. Glycoconj. J. 1993, 10, 261.