10H-(1)Benzothieno(2,3-d)-1,3,4-thiadiazolo(3,2-a)pyrimidin-10-one, 2-phenyl- 110543-88-9 2-Phenyl-10H-(1)benzothieno(2,3-d)-1,3,4-thiadiazolo(3,2-a)pyrimidin-10-one