You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-[6-chloro-6-(3-phenylmethoxyphenyl)sulfanylcyclohexa-2,4-dien-1-yl]butanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H27ClO3S
assistant