Synonyms: [1]benzothieno[2,3-d]pyrimidin-4(1H)-one, 2,3,5,6,7,8-hexahydro-6-methyl-3-phenyl-2-thioxo-;[1]Benzothieno[2,3-d]pyrimidin-4(3H)-one, 5,6,7,8-tetrahydro-2-mercapto-6-methyl-3-phenyl-;6-Methyl-3-phenyl-2-sulfanyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidin-4(3H)-one