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 4-[(2-amino-1,3-thiazol-5-yl)methyl]-3-methyl-3-propylpiperazin-2-one;hydrochloride is given. What is its corresponding molecular formula?
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C12H21ClN4OS
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