You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-(methylsulfanylmethyl)benzimidazol-1-yl]-N-[[2-[4-(pyrazol-1-ylmethyl)phenyl]phenyl]methyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H27N5OS
assistant