You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S)-1-[(3S,4S)-4-[4-methoxy-3-(4-phenylphenoxy)phenyl]-1,3-dimethylpyrrolidin-3-yl]ethanol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H31NO3
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