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system
Provide the molecular formula for the IUPAC named substance (2R)-2-amino-3-(4-iodophenyl)-1-[4-[(5R)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl]piperazin-1-yl]propan-1-one .
user
C21H26IN5O
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