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Name the molecular formula for the molecule established as (E)-3-[5-chloro-2-(tetrazol-1-yl)phenyl]-N-[(15S)-9-oxo-3,8,17-triazatricyclo[14.3.1.02,7]icosa-1(20),2(7),3,5,16,18-hexaen-15-yl]prop-2-enamide using the IUPAC nomenclature.
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C27H25ClN8O2
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