2.6-Dimethyl-4-mercapto-5-acetyl-pyrimidon oder 2.6-Dimethyl-4-thiono-5-acetyl-3.4-dihydro-pyrimidin;1-(2,4-dimethyl-6-thioxo-1,6-dihydro-pyrimidin-5-yl)-ethanone;1-(2,4-Dimethyl-6-sulfanylidene-1,6-dihydropyrimidin-5-yl)ethan-1-one;1-(2,6-dimethyl-4-sulfanylidene-1H-pyrimidin-5-yl)ethanone