You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3R,4S,5R)-12-oxotetracyclo[11.4.0.02,5.06,11]heptadeca-1(17),6,8,10,13,15-hexaene-3,4-dicarboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
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