You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[1-[2-[(9H-fluoren-9-ylmethoxycarbonylamino)methyl]-3-methylbutanoyl]piperidin-3-yl]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H34N2O5
assistant