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system
Name the molecular formula for the molecule established as (1R,2R,12R,13S)-17,18-dimethoxy-21-methyl-11,21-diazapentacyclo[11.7.1.02,11.04,9.015,20]henicosa-4,6,8,15,17,19-hexaene-12-carbonitrile using the IUPAC nomenclature.
user
C23H25N3O2
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