You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2Z)-2-cyano-2-[(5E)-3-ethyl-5-[[3-[[2-(2-methoxyethoxy)acetyl]amino]anilino]methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]acetic acid by IUPAC nomenclature, provide its molecular formula.
user
C20H22N4O6S
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