You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-oxo-2-[[phenyl(thiophen-2-yl)methyl]amino]ethyl] 2-thiophen-3-yl-1,3-thiazole-4-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H16N2O3S3
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