You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9H-fluoren-9-ylmethyl N-[4-[[9-[(2R,4R,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]-4-oxobutyl]-N-methylcarbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H32N6O6
assistant