You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[4-[[2-[(3R,4R)-3-amino-4-fluoropyrrolidin-1-yl]-9-methylpurin-6-yl]amino]-3-methoxypyrazol-1-yl]propyl]-4-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-3-methoxybenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C39H50FN15O4
assistant