You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance methyl 2-[6-[(1R)-1-aminoethyl]-1H-pyrrolo[2,3-b]pyridin-2-yl]-7-methoxy-1-methylbenzimidazole-5-carboxylate .
user
C20H21N5O3
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