You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[2-[3-(4-fluorophenyl)-6-oxopyridazin-1-yl]ethyl]-3-(furan-2-yl)prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H16FN3O3
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