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 2-[6-chloro-4-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-8-fluoroquinazolin-7-yl]-3-fluorophenol .
user
C21H20ClF2N3O
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