116776-43-3 5,6-Dihydro-5-imino-2-methyl-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-5-imino-2-methyl- BRN 4313368