You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N'-[(1Z)-1-(4,5-dimethylpyrazol-1-yl)-3-(2-methylphenyl)buta-1,3-dienyl]-N-methylpropane-1,3-diamine ?
user
C20H28N4
assistant