You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-[4-[(3-bromo-1H-pyrrolo[2,3-b]pyridin-4-yl)oxy]-3,5-difluorophenyl]-3-(2-morpholin-4-yl-2-oxoethyl)urea .
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C20H18BrF2N5O4
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