You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5Z)-5-[[2-[(2,4-dichlorophenyl)methoxy]phenyl]methylidene]-3-(4-ethoxyphenyl)-2-sulfanylideneimidazolidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H20Cl2N2O3S
assistant