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Name the molecular formula for the molecule established as [(5S,10bS)-2-naphthalen-2-yl-5,10b-dihydro-1H-pyrazolo[1,5-c][1,3]benzoxazin-5-yl]-(4-chlorophenyl)methanone using the IUPAC nomenclature.
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C27H19ClN2O2
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