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 2-[3-[(2R,3S)-3-hydroxy-2-(hydroxymethyl)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl]propyl]isoindole-1,3-dione .
user
C21H23N3O7
assistant