You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[2-[4-(1-aminocyclobutyl)phenyl]-3-phenylpyrimido[1,2-b]indazol-7-yl]benzonitrile by IUPAC nomenclature, provide its molecular formula.
user
C33H25N5
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