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-methoxypyrimidin-4-yl)-[(4R)-spiro[2,3-dihydro-1H-naphthalene-4,3'-piperidine]-1'-yl]methanone .
user
C20H23N3O2
assistant