You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (5Z)-5-[[3-bromo-5-methoxy-4-(2-phenoxyethoxy)phenyl]methylidene]-3-ethyl-2-sulfanylidene-1,3-thiazolidin-4-one ?
user
C21H20BrNO4S2
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