SEARCH Articles Figures Tables 4-Picolyl esters carboxy-protecting groups Allyl esters carboxy-protecting groups Benzyl esters carboxy-protecting groups Carboxy group Carboxy-protecting groups Glycopeptides carboxy-protecting groups Methyl esters carboxy-protecting groups Ortho esters carboxy group protection Oxazolines carboxy group protection Phenacyl esters carboxy-protecting groups Polyamides carboxy-protecting groups Protection of carboxy groups