You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[5-(2-chlorophenyl)-4-cyclopentyl-1,2,4-triazol-3-yl]sulfanyl]-2-phenyl-1-pyrrolidin-1-ylethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H27ClN4OS
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