You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(4-chlorophenyl)-4,6-bis(4-methoxyphenyl)-1-phenylpyrazolo[3,4-b]pyridine-5-carbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H23ClN4O2
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