You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6,18-bis(furan-2-yl)-12-oxapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(13),2(11),3,5,7,9,14,16,18,20-decaene into its molecular formula.
user
C28H16O3
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