You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[(9Z)-3-(4-cyanophenyl)-9-hydroxyimino-10-imino-6-phenylphenanthridin-8-yl]-3,5-difluorobenzonitrile .
user
C33H17F2N5O
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