You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(4-chlorophenyl)-N-[(2-methoxyphenyl)methyl]-6-phenyl-2H-pyrazolo[3,4-b]pyridine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H21ClN4O2
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