You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[5,6-difluoro-4-[(3S)-3-[2-methoxyethyl(methyl)amino]pyrrolidin-1-yl]-8-(methylamino)-9H-pyrido[2,3-b]indol-3-yl]-1-methyl-4-oxo-1,8-naphthyridine-3-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H31F2N7O4
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