You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[(1S)-2-(2-methylpropyl)-3-oxo-1H-isoindol-1-yl]amino]-N-(2-phenylethyl)benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H29N3O2
assistant