You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-O-tert-butyl 2-O-methyl (2S,4R)-4-methyl-5-oxopyrrolidine-1,2-dicarboxylate using the IUPAC nomenclature.
user
C12H19NO5
assistant