You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-oxo-2-[[4-(2,4,5-trimethylphenyl)-1,3-thiazol-2-yl]amino]ethyl]thiophene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19N3O2S2
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