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system
Provide the molecular formula for the IUPAC named substance 2-(16,18-dioxo-17-azapentacyclo[6.6.5.02,7.09,14.015,19]nonadeca-2,4,6,9,11,13-hexaen-17-yl)ethyl 2,3,4,5,6-pentachlorobenzoate .
user
C27H16Cl5NO4
assistant