You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,6S,9S,10R,14R)-12,12-dimethyl-8,11,13,15-tetraoxatetracyclo[7.6.0.02,6.010,14]pentadec-2-en-4-one by IUPAC nomenclature, provide its molecular formula.
user
C13H16O5
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