1,2,3,4-Tetrahydro-6-methyl-2,4-bis(2-nitrophenyl)-5-pyrimidinecarboxylic Acid Methyl Ester-d3 is the isotope labelled analog of 1,2,3,4-Tetrahydro-6-methyl-2,4-bis(2-nitrophenyl)-5-pyrimidinecarboxylic Acid Methyl Ester (T295600); an impurity of Nifedipine (N457000) which is a dihydropyridine calcium channel blocker. Also used as an antihypertensive and antianginal.