SEARCH Articles Figures Tables 1- Methyl pyridine 3-Pyridine acetic acid 5,5-acetal ester Acetals methylation Acetate esters Acetates methylated Acetic acid esters Acetic acid, methyl ester Methyl acetals Methyl acetate Methyl ester acetate Pyridin methylation Pyridine acetate Pyridine acetic acid esters Pyridine-2-acetic ester Pyridines acidity