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system
Name the molecular formula for the molecule established as (2S,6S)-4-acetyl-18-methoxy-12-methyl-20-oxa-1,4,9,12,23,24-hexazatetracyclo[20.2.1.02,6.014,19]pentacosa-14(19),15,17,22(25),23-pentaene-8,13-dione using the IUPAC nomenclature.
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C22H28N6O5
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