You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[(5E)-5-[[4-(difluoromethoxy)phenyl]methylidene]-2,4-dioxo-1,3-thiazolidin-3-yl]ethyl]pyrazine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H14F2N4O4S
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