103344-19-0 2,6-Diphenyl-8H-(1,3,4)thiadiazolo(3,2-a)thieno(2,3-d)pyrimidin-8-one 8H-(1,3,4)Thiadiazolo(3,2-a)thieno(2,3-d)pyrimidin-8-one, 2,6-diphenyl- BRN 5614369