You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (2S)-4-[7-bromo-4-[2-fluoro-5-methyl-4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)anilino]pyrido[3,2-d]pyrimidin-6-yl]-2-(hydroxymethyl)piperazine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H31BrFN9O4
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