You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(2-methylpropyl)-N-[[4-[4-(oxetan-3-yl)piperazin-1-yl]phenyl]methyl]-1-phenylmethanesulfonamide into molecular formula.
user
C25H35N3O3S
assistant