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