110543-81-2 2-Methyl-5H-benzothieno(3,2-d)(1,3,4)thiadiazolo(3,2-a)pyrimidin-5-one 2-Metil-5H-benzotieno(3,2-d)(1,3,4)tiadiazolo(3,2-a)pirimidin-5-one [Italian] 5H-Benzothieno(3,2-d)(1,3,4)thiadiazolo(3,2-a)pyrimidin-5-one, 2-methyl-