You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named ethyl 3-[1-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylmethoxycyclobutyl]prop-2-enoate by IUPAC nomenclature, provide its molecular formula.
user
C21H29NO5
assistant