You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule ethyl 3-(4-amino-5-phenylpyrrolo[2,3-d]pyrimidin-7-yl)piperidine-2-carboxylate;dihydrochloride .
user
C20H25Cl2N5O2
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