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 (3R)-1-[6-[(1S,8R)-5-(2,6-difluorophenyl)-11,11-dimethyl-3,4-diazatricyclo[6.2.1.02,7]undeca-2,4,6-trien-1-yl]pyrazin-2-yl]-3-methylpentan-1-one is given. What is its corresponding molecular formula?
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C27H28F2N4O
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