You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-1-(6-methyl-7,8-dihydro-5H-pyrido[4,3-d]pyrimidin-2-yl)pyrrolidin-3-amine;trihydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H22Cl3N5
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