Synonyms: 1,4,4,6-Tetramethyl-3,4-dihydropyrimidine-2(1H)-thione;3,4-Dihydro-1,4,4,6-tetramethyl-2(1H)-pyrimidinethione;2(1H)-Pyrimidinethione, 3,4-dihydro-1,4,4,6-tetramethyl-;2-Thio-1,4,4,6-tetramethyl dihydropyrimidine;Ai3-24031;Nsc 49822;Usaf K-1338