You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[5-anilino-4-(2,4-dichlorobenzoyl)-3-phenylthiophen-2-yl]-3-hydroxy-5,5-dimethylcyclohex-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H25Cl2NO3S
assistant