(1)Benzothieno(2,3-d)pyrimidin-4(3H)-one, 5,6,7,8-tetrahydro-2,6-dimethyl- 2,6-Dimethyl-5,6,7,8-tetrahydro(1)benzothieno(2,3-d)pyrimidin-4(3H)-one 70733-10-7