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system
Name the molecular formula for the molecule established as 13-(4-imidazol-1-ylphenyl)-4,8-dioxa-12,14,16,18-tetrazatetracyclo[9.7.0.03,9.012,17]octadeca-1,3(9),10,14,17-pentaen-15-amine using the IUPAC nomenclature.
user
C21H19N7O2
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