You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-[cyclobutyl-[1-(2,3-dimethylphenyl)-2-oxo-2-(pentan-2-ylamino)ethyl]amino]-1-oxopropan-2-yl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H43N3O4
assistant