116776-44-4 5,6-Dihydro-2-ethyl-5-imino-7H-1,3,4-thiadiazolo(3,2-a)pyrimidin-7-one 7H-1,3,4-Thiadiazolo(3,2-a)pyrimidin-7-one, 5,6-dihydro-2-ethyl-5-imino- BRN 5027626