You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [4-[(3R)-3-aminopyrrolidin-1-yl]-5,6-dimethylpyrimidin-2-yl]-(8-fluoro-6-methyl-3,4-dihydro-1H-isoquinolin-2-yl)methanone into its molecular formula.
user
C21H26FN5O
assistant