You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3Z,3aS,9R,9aS,9bS)-3-[(2-fluorophenyl)methylidene]-6,9-dimethyl-9-triethylsilyloxy-4,5,7,8,9a,9b-hexahydro-3aH-azuleno[4,5-b]furan-2-one by IUPAC nomenclature, provide its molecular formula.
user
C27H37FO3Si
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