A carboxylic ester obtained by the formal condensation of the carboxy group of 3-(methylthio)propionic acid with ethanol. ChEBI: Ethyl 3-(methylthio)propionate is a carboxylic ester obtained by the formal condensation of the carboxy group of 3-(methylthio)propionic acid with ethanol. It has a role as a plant metabolite. It is a carboxylic ester and a methyl sulfide. It is functionally related to a 3-(methylthio)propionic acid.