You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1S,4R,6S,7Z,11R,13R,14S,18R)-14-(2,2-dimethylpropanoylamino)-N-[1-(fluoromethyl)cyclopropyl]sulfonyl-18-(7-methoxyquinoxalin-2-yl)oxy-11,13-dimethyl-2,15-dioxo-3,16-diazatricyclo[14.3.0.04,6]nonadec-7-ene-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C38H51FN6O8S
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