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 2-N-(7-fluoro-1,2,3,4-tetrahydroisoquinolin-6-yl)-4-N-(2-propan-2-ylsulfonylphenyl)-1,3,5-triazine-2,4-diamine .
user
C21H23FN6O2S
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