SEARCH Articles Figures Tables Bis Ester Bis methyl esters, to protect Bis methylation Carboxyl groups, protection Carboxyl protecting groups Carboxylation Groups, esters Carboxylic methyl esters Carboxylic methyl groups) Ester groups Ester protecting groups Esters to protect carboxyl groups Esters, protection Methyl carboxylate Methyl ester group Methyl esters, to protect carboxyl groups Methyl group Protection methyl esters Protective groups esters Protective groups methyl ester