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system
Name the molecular formula for the molecule established as (1R,8R,10S)-3,8-dihydroxy-4,12-dimethoxy-17-azatetracyclo[8.4.3.01,10.02,7]heptadeca-2(7),3,5,12-tetraen-11-one using the IUPAC nomenclature.
user
C18H21NO5
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