Metalaxyl-M-d6 ((R)-Metalaxyl-d6) is the deuterium labeled Metalaxyl-M (HY-B0843A). Metalaxyl-M ((R)-Metalaxyl) is an orally active and selective inhibitor of fungal RNA polymerase, which exerts fungicidal activity by selectively interfering with the synthesis of fungal ribosomal RNA. Metalaxyl-M can also be used to induce inflammation in hepatocytes and regulate tryptophan metabolism. Metalaxyl-M can be used in ecotoxicology studies[1][2][3].