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 (1S,2S)-1-(5-chloropyrimidin-2-yl)-N-[4-(2-methoxyethyl)-5-(6-methoxypyridin-2-yl)-1,2,4-triazol-3-yl]-1-propan-2-yloxypropane-2-sulfonamide is given. What is its corresponding molecular formula?
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C21H28ClN7O5S
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