You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[[(1R,3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)cyclohexanecarbonyl]amino]methyl]-3-methylbutanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C28H34N2O5
assistant