You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[5-[2-[5-(4-chlorophenyl)pyridin-2-yl]ethynyl]pyridin-2-yl]-N',N'-bis(cyclopropylmethyl)ethane-1,2-diamine into its molecular formula.
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C28H29ClN4
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