You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[(4S)-1-ethyl-2,5-dioxo-4-(3-phenoxyphenyl)-4,7-dihydro-3H-pyrrolo[3,4-d]pyrimidin-6-yl]-N-[(4-fluorophenyl)methyl]-4-methylpentanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H35FN4O4
assistant