You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(1-benzofuran-5-ylmethyl)-N',N'-bis(2-methylpropyl)-2-(pyridin-3-ylmethyl)propanediamide by IUPAC nomenclature, provide its molecular formula.
user
C26H33N3O3
assistant