You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-2-[(5S)-2,3-dimethoxy-5-[2-[4-(trifluoromethyl)phenyl]ethyl]-7,8-dihydro-5H-pyrido[3,4-b]pyrazin-6-yl]-N-methyl-2-phenylacetamide into its molecular formula.
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C27H29F3N4O3
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