You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1'-[(6-methylpyridin-2-yl)methyl]spiro[2,3-dihydro-1H-isoquinoline-4,4'-piperidine] using the IUPAC nomenclature.
user
C20H25N3
assistant