You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-(2,7-diazaspiro[3.4]octan-2-yl)-5-fluoropyrimidin-4-yl]indazol-5-amine by IUPAC nomenclature, provide its molecular formula.
user
C17H18FN7
assistant