You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-amino-2-(2,6-difluorophenyl)-N-[3-[(2R)-2-methylpiperazin-1-yl]-2H-pyrrol-4-yl]-1,3-thiazole-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C19H20F2N6OS
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