1,3,5-triphenylpyrrolo[3,4-c]pyrazole-4,6-dione

<(1'-phenyl-2',5'-dioxo-4'-hydroxy-pyrrolidene)3'-phenylmethylidene>1-phenylhydrazone

2-benzyl-6-phenyl-4,5-dihydropyridazin-3-one

3-methyl-1,5,5-triphenyl-4H-pyrazole

4-methylsulfanyl-2-phenyl-6-(2-phenylhydrazinyl)pyrimidine-5-carbonitrile