You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (5Z)-5-[(2,4-dichlorophenyl)methylidene]-3-ethyl-2-(4-hydroxyphenyl)imino-1,3-thiazolidin-4-one .
user
C18H14Cl2N2O2S
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