You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[3-(9H-fluoren-9-ylmethoxycarbonylamino)cyclobutanecarbonyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid ?
user
C26H26N2O5
assistant