You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5-[(2,3-dichlorophenoxy)methyl]furan-2-yl]-1-(1-ethylpyrazol-3-yl)prop-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H16Cl2N2O3
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