2-ethyl-6,7,8,9-tetrahydro-[1,3,4]thiadiazolo[2,3-b]quinazolin-5-one

N-(5-ethyl-1,3,4-thiadiazol-2-yl)-5-fluoro-2-methylbenzenesulfonamide

methyl N-[(5-ethyl-1,3,4-thiadiazol-2-yl)carbamothioyl]carbamate

2-ethyl-7-phenyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-5-one