2-thioxo-2,3-dihydropyrimidin-4(1H)-one 4(1H)-pyrimidinone, 2,3-dihydro-2-thioxo- InChI=1/C4H4N2OS/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8