You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-cyclopropyl-6-fluoro-8-methoxy-7-(7-nitroso-5-azaspiro[2.4]heptan-5-yl)-4-oxoquinoline-3-carboxylic acid .
user
C20H20FN3O5
assistant