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system
Translate the chemical IUPAC name tert-butyl 5-(2-amino-2-oxoethyl)-1-(5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)spiro[2H-indole-3,4'-piperidine]-1'-carboxylate into its molecular formula.
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C27H35N5O3
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