1,1'-Methylenebis-1H-pyrazole

nitro-4 methylene-1,1' dipyrazole

4-nitro-1-[(4-nitropyrazol-1-yl)methyl]pyrazole

2-pyrazol-1-yl-N-(2-pyrazol-1-ylethyl)ethanamine

1-[2-(4-phenylmethoxyphenyl)ethyl]pyrazole