You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-[(2,6-dichlorophenyl)methoxy]-3-methoxyphenyl]-N-(2,6-diethylphenyl)prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H27Cl2NO3
assistant