You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 3-[[4-[1-(4-methylphenyl)-6-oxopyridazin-3-yl]piperazine-1-carbonyl]amino]-3-phenylpropanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H31N5O4
assistant