You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3S,4R)-1-(2-chlorobenzoyl)-4-(3,4,5-trimethoxyphenyl)pyrrolidin-3-yl]-piperidin-1-ylmethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H31ClN2O5
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