You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [5-(difluoromethoxy)pyridin-2-yl] N-[3-[(3R)-5-amino-3-(difluoromethyl)-2,6-dihydro-1,4-oxazin-3-yl]-4-fluorophenyl]carbamate by IUPAC nomenclature, provide its molecular formula.
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C18H15F5N4O4
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