You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1S,11R,13R)-9,18-dioxapentacyclo[9.6.1.01,13.02,10.03,8]octadeca-2(10),3,5,7-tetraene into molecular formula.
user
C16H16O2
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