You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-1-[4-(2-oxo-1,4-dihydroquinazolin-3-yl)piperidin-1-yl]-4-(3,4,5-trimethoxyphenyl)but-2-ene-1,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H29N3O6
assistant