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G. Bayryamov, Stanislav; G. Vassilev, Nikolay; D. Petkov, Dimiter . (2010). The Two Pathways for Effective Orthogonal Protection of L-Ornithine, for Amino Acylation of 5-O-Pivaloyl Nucleosides, Describe the General and Important Role for the Successful Imitation, During the Synthesis of the Model Substrates for the Ribosomal Mimic Reaction. Protein & Peptide Letters, 17(7), 889–898. doi:10.2174/092986610791306625 
10.2174/092986610791306625