You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(cyclopropylmethylamino)-1-[4-[(2,5-dimethoxyphenyl)methyl]piperazin-1-yl]ethanone;dihydrochloride into its molecular formula.
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C19H31Cl2N3O3
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