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system
Name the molecular formula for the molecule established as 2-methyl-1-[3-[[(1S)-1-[4-(6-methyl-2-oxo-7H-pyrrolo[2,3-d]pyrimidin-3-yl)phenyl]ethyl]amino]propyl]guanidine using the IUPAC nomenclature.
user
C20H27N7O
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