You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[3-tert-butyl-4-methoxy-5-[(E)-2-(2-methylsulfonylphenyl)ethenyl]phenyl]-1H-pyridin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27NO4S
assistant