2-[3,5-Dichloro-4-[[1,6-dihydro-5-[1-(methyl-d3)ethyl-2,2,2-d3]-6-oxo-3-pyridazinyl]oxy]phenyl]-2,3,4,5-tetrahydro-3,5-dioxo-1,2,4-triazine-6-carbonitrile,2-[3,5-Dichloro-4-[[1,6-dihydro-5-[1-(methyl-d3)ethyl-2,2,2-d3]-6-oxo-3-pyridazinyl]oxy]phenyl]-2,3,4,5-tetrahydro-3,5-dioxo-1,2,4-triazine-6-carbonitrile,Resmetirom