You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-1-(cyclobutanecarbonyl)-N-methyl-3-[(4-thiophen-3-ylphenyl)methyl]pyrrolidine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26N2O2S
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