SEARCH Articles Figures Tables 5- Acetyl-2-ethyl Acetyl esters Carboxylic acids methyl esters Carboxylic acids methylation Carboxylic methyl esters Ester acetylation Ethyl 4 -carboxylates Ethyl acetylation Ethyl pyrrole-2-carboxylate Methyl carboxylate Pyrrole 2 - methyl - 4 - -, ethyl ester Pyrrole 2-carboxylate Pyrrole 3 - acetyl - 2 - methyl - 4 - -, ethyl ester Pyrrole 3 - acetyl - 5 - 1- ethyl-2-methyl Pyrrole Carboxylic Acid Esters Pyrrole acetylation Pyrrole acidity Pyrrole carboxylic esters Pyrrole esters Pyrrole, carboxylation Pyrrole-3-carboxylic acid, acidity Pyrrole-carboxylic acids Pyrroles 3- carboxylic acids Pyrroles 3-methyl Pyrroles carboxylation Pyrrolic acids