You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [9-[[2-(2-methylprop-2-enoxy)phenyl]methyl]-3,9-diazaspiro[5.5]undecan-3-yl]-pyridin-4-ylmethanone into molecular formula.
user
C26H33N3O2
assistant