(Methyl-d3) 4-Hydroxy Cinnamate is deuterium labeled Methyl 4-Hydroxy Cinnamate (M312595), which is an antifungal agent. Methyl 4-Hydroxy Cinnamate can be used in structure-antifungal activity relationship study against Aspergillus flavus, Aspergillus terreus, and Aspergillus niger.