You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 3-amino-6-chloro-5-[(3S)-4-[1-(4-chloro-2-propoxybenzoyl)piperidin-4-yl]-3-ethylpiperazin-1-yl]-N-(2-hydroxyethyl)pyrazine-2-carboxamide is given. What is its corresponding molecular formula?
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C28H39Cl2N7O4
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