You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-2-(2-bromo-4,5-dimethoxyphenyl)-3-(4-methoxyphenyl)-3-methylsulfanyl-1-phenylprop-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H23BrO4S
assistant