4-amino-3,4-dihydro-6-styryl-3-thioxo-1,2,4-triazin-5(2H)-one

6-phenacyl-3-sulfanylidene-2H-1,2,4-triazin-5-one

4-(benzylideneamino)-3-mercapto-6-styryl-1,2,4-triazin-5(4H)-one

6-phenyl-2H-thieno[2,3-e][1,2,4]triazine-3-thione