You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6-[5-(4-fluorophenyl)-3-(3-fluoropropyl)imidazol-4-yl]imidazo[1,2-b]pyridazine-3-carbonitrile by IUPAC nomenclature, provide its molecular formula.
user
C19H14F2N6
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