You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-amino-1-[4-[[4-[methyl-(2-phenylpyrimidin-4-yl)amino]pyrimidin-2-yl]amino]piperidin-1-yl]propan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C23H28N8O
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