1,5,6,7-Tetrahydro-2-phenyl-4H-cyclopenta(4,5)thieno(2,3-d)pyrimidin-4-one 18678-30-3 4H-Cyclopenta(4,5)thieno(2,3-d)pyrimidin-4-one, 1,5,6,7-tetrahydro-2-phenyl-