You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,3aR,6S,6aR)-3-(2-chloro-4-nitrophenoxy)-6a-methyl-3,3a,5,6-tetrahydro-2H-furo[3,2-b]furan-6-ol by IUPAC nomenclature, provide its molecular formula.
user
C13H14ClNO6
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