You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[5-[(1E,6Z)-cyclonona-1,6-dien-4-yn-1-yl]thiophen-2-yl]methoxy]-5-fluoro-N-methylpyrimidin-4-amine by IUPAC nomenclature, provide its molecular formula.
user
C19H18FN3OS
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