You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,5S)-2-N-(2-benzyl-5-thiophen-2-ylpyrazol-3-yl)oxolane-2,5-dicarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H20N4O3S
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