You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 20-(3-azidopropyl)-5,7-dioxa-20-azapentacyclo[10.8.0.02,10.04,8.013,18]icosa-1(12),2,4(8),9,13,15,17-heptaene-11,19-dione into its molecular formula.
user
C20H14N4O4
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