You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R)-1-[1-(2-methoxybenzoyl)piperidin-4-yl]-2-[[(2S)-3-methylbutan-2-yl]amino]-2-oxoethyl]-2-methylbenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H37N3O4
assistant