– (S)-Methyl 3-hydroxybutanoate is a compound characterized by a chiral center, resulting in two enantiomers, with this form being the stereoisomer where the hydroxy group is located at the S configuration on the third carbon atom of the carboxylic acid group. It is commonly employed as a foundational material in the synthesis of various pharmaceuticals and natural products. Due to its fruity aroma, it is also utilized as a component in flavors and fragrances.