You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[4-tert-butyl-5-methoxy-2-(2-oxo-1H-pyridin-3-yl)phenyl]-2-phenylpropanamide by IUPAC nomenclature, provide its molecular formula.
user
C25H28N2O3
assistant