You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (2Z,4Z)-3-chloro-2-ethenyl-N-[3-fluoro-5-[methyl-(1-methylpiperidin-4-yl)amino]phenyl]hexa-2,4-dienamide is given. What is its corresponding molecular formula?
user
C21H27ClFN3O
assistant