You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[2-chloro-4-(5-methylpyrrolo[3,2-d]pyrimidin-4-yl)oxyphenyl]-3-[4-hydroxy-3-(trifluoromethyl)phenyl]urea .
user
C21H15ClF3N5O3
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