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 methyl 6-(7,7-dimethyl-6-oxa-9-azaspiro[4.5]decan-9-yl)-2-methylpyridine-3-carboxylate using the IUPAC nomenclature.
user
C18H26N2O3
assistant