You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 12,16-dithia-1,14-diazahexacyclo[11.11.0.02,11.04,9.015,23.017,22]tetracosa-2(11),4,6,8,13,15(23),17(22)-heptaene-3,10,24-trione into its molecular formula.
user
C20H12N2O3S2
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