You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[3-[(3aS,7aR)-1,3-dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl]propanoyl-benzylamino]-N-[(2R)-butan-2-yl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H33N3O4
assistant