You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-1-(6-amino-5-chloropyrimidin-4-yl)-N-[(1S)-3-hydroxy-1-(4-methoxyphenyl)propyl]piperidine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H27ClN6O3
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