SEARCH Articles Figures Tables 5- Acetyl-2-ethyl Acetyl esters Ester acetylation Ethyl acetylation Pyrrole 2 - methyl - 4 - -, ethyl ester Pyrrole 3 - acetyl - 5 - 1- ethyl-2-methyl Pyrrole acetylation Pyrrole esters Pyrrole-3-carboxylic acid, 4-acetyl-1-panisyl-5-methyl ethyl ester Pyrroles 3-methyl