You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-(phenoxymethyl)benzimidazol-1-yl]-N-(2-pyrrolidin-1-yl-2-thiophen-2-ylethyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H28N4O2S
assistant