2-phenyl-5,6-dihydro-3H-thieno[2,3-d]pyrimidin-4-one

3-phenyl-5,6-dihydro-1H-thieno[2,3-d]pyrimidine-2,4-dione

3-methyl-5,6-dihydro-1H-thieno[2,3-d]pyrimidine-2,4-dione

2-[3-(4-oxo-5,6-dihydrothieno[2,3-d][1,3]oxazin-2-yl)phenyl]-5,6-dihydrothieno[2,3-d][1,3]oxazin-4-one

2-phenyl-5,6-dihydrothieno[2,3-d][1,3]oxazin-4-one