6-ethyl-2,5-diphenyl-4,6-dihydro-1,3,4-thiadiazin-5-ol

2,5-diphenyl-6H-1,3,4-thiadiazine

5-(4-methylphenyl)-2-phenyl-6H-1,3,4-thiadiazine

5-(4-methoxyphenyl)-2-phenyl-6H-1,3,4-thiadiazine

5-(4-chlorophenyl)-2-phenyl-6H-1,3,4-thiadiazine