You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (6S)-N-[(4-fluorophenyl)methyl]-5-(4-methoxyphenyl)-6-methyl-4-oxo-2-thiophen-2-yl-7H-pyrazolo[1,5-a]pyrazine-6-carboxamide into molecular formula.
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C26H23FN4O3S
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