Naming Esters. Esters (R-CO-O-R') are named as alkyl derivatives of carboxylic acids. The alkyl (R') group is named first. The R-CO-O part is then named as a separate word based on the carboxylic acid name, with the ending changed from -oic acid to -oate . Alcohol component
The hydrogen in the -COOH group is replaced by an alkyl group in this case, a methyl group.
Ester names are confusing because the name is written backwards from the way the structure is drawn