You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,14E)-N-(1-aminocyclopropyl)-8,19-dichloro-5-oxo-12,17-dioxa-4-azatricyclo[16.2.2.06,11]docosa-1(20),6(11),7,9,14,18,21-heptaene-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C23H23Cl2N3O4
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