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system
Provide the molecular formula for the IUPAC named substance (5Z)-2-amino-4,6-dimethyl-5-[[(4S)-1,2,2,4-tetramethyl-3,4-dihydroquinolin-6-yl]methylidene]cyclopenta[b]pyridine-3,7-dicarbonitrile .
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C26H27N5
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