You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-3-[4,6-dimethoxy-2-[(E)-2-(4-methoxyphenyl)ethenyl]-3-methylphenyl]-1-(2-methoxyphenyl)prop-2-en-1-one by IUPAC nomenclature, provide its molecular formula.
user
C28H28O5
assistant