You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[3-(9H-fluoren-9-ylmethoxycarbonylamino)-3-methylbutanoyl]-7-azabicyclo[2.2.1]heptane-1-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H30N2O5
assistant