You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[(4-isocyano-2-pyrazin-2-ylpyrazol-3-yl)diazenyl]-5-methyl-2-pyrimidin-2-ylpyrazol-3-amine .
user
C16H12N12
assistant