You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2R,3R)-8-methoxy-3-(4-methylphenyl)-1,2,3,4-tetrahydrodibenzofuran-2-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22O3
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