You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[(5-methyl-1H-indazole-3-carbonyl)amino]methyl]spiro[2-oxabicyclo[2.1.1]hexane-3,4'-piperidine]-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H25N5O3
assistant