You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (4S,5S,6R)-4-benzyl-3-methylidene-6-phenoxy-1-azabicyclo[3.2.0]heptan-7-one is given. What is its corresponding molecular formula?
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C20H19NO2
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