You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3S,4R,5R)-5-[6-ethoxy-2-[[(4-methoxyphenyl)-diphenylmethyl]amino]purin-9-yl]-2,4-difluoro-2-(hydroxymethyl)-4-methyloxolan-3-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C33H33F2N5O5
assistant