You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 6-[2-cyclopropyl-5-fluoro-4-[(2-methylpropan-2-yl)oxycarbonyl]phenoxy]-2-azaspiro[3.3]heptane-2-carboxylic acid .
user
C21H26FNO5
assistant