You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3,4-dimethoxyphenyl)-[(2E)-2-[(3,5-dimethyl-1,2-oxazol-4-yl)methylidene]-1,3-thiazolidin-3-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H20N2O4S
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