You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-(2,6-dimethylphenyl)-4-(3-pyridin-2-ylbenzene-4-id-1-yl)benzonitrile;iridium by IUPAC nomenclature, provide its molecular formula.
user
C26H19IrN2-
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