You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (4S)-1-methyl-4-phenyl-6-propan-2-yl-4,7-dihydro-3H-pyrrolo[3,4-d]pyrimidine-2,5-dione .
user
C16H19N3O2
assistant