You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-chloro-2-methoxy-5-methylphenyl)-2-[(4,5-diphenyl-1H-imidazol-2-yl)sulfanyl]butanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H26ClN3O2S
assistant