You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S,4R)-3,5,5-trideuterio-4-[(5-deuterio-2,3-dimethylimidazol-4-yl)methyl]-3-ethyloxolan-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H18N2O2
assistant