You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(methylaminomethyl)piperidin-1-yl]-[3-(pyrrolidin-1-ylmethyl)phenyl]methanone;dihydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H31Cl2N3O
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