You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5Z)-5-[[4-[(2,4-dichlorophenyl)methoxy]-3-methoxyphenyl]methylidene]-2-imino-1,3-thiazolidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H14Cl2N2O3S
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