Eugenol synthase (, LtCES1, EGS1, EGS2) is an enzyme with systematic name eugenol:NADP<sup>+</sup> oxidoreductase (coniferyl ester reducing). This enzyme catalyses the following chemical reaction: eugenol + a carboxylate + NADP<sup>+</sup> a coniferyl ester + NADPH + H<sup>+</sup>
The enzyme acts in the reverse direction.