You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[3-(4-chloroanilino)-2-(4-methoxyphenyl)-6,6-dimethyl-4-oxo-5,7-dihydroindol-1-yl]acetic acid into its molecular formula.
user
C25H25ClN2O4
assistant