You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[2-[4-amino-7-cyclopentyl-5-(4-phenoxyphenyl)pyrrolo[2,1-f][1,2,4]triazin-6-yl]ethyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
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C27H29N5O2
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