You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[(6-cyclopropylpyrimidin-4-yl)methyl]-3-(3,4,5-trimethoxyphenyl)prop-2-enamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H23N3O4
assistant