You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 20,21-diazapentacyclo[10.7.1.12,10.03,8.014,19]henicosa-1(20),2(21),3,5,7,9,12,14,16,18-decaen-11-one by IUPAC nomenclature, provide its molecular formula.
user
C19H10N2O
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