You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methylpropyl (4R,7S)-2-methyl-5-oxo-4,7-diphenyl-4,6,7,8-tetrahydro-1H-quinoline-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H29NO3
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