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 4-N-[3-(2,5-dimethylpyrrol-1-yl)phenyl]-2-N,2-N,6-trimethyl-7H-pyrrolo[2,3-d]pyrimidine-2,4-diamine .
user
C21H24N6
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