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system
Name the molecular formula for the molecule established as 1-[7-(3-fluorophenyl)-4,8,9,15-tetrazatetracyclo[10.2.1.02,10.05,9]pentadeca-2(10),3,5,7-tetraen-15-yl]butan-1-one using the IUPAC nomenclature.
user
C21H21FN4O
assistant