You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(2R)-1-acetamidopropan-2-yl]-5-methoxy-N-methyl-3a,4-dihydro-1H-pyrrolo[3,2-b]pyridine-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H22N4O3
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