You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (6S,8aR)-6,8,8a-trimethyl-4a,5,6,7-tetrahydro-[1,4]dioxino[2,3-b]pyrazine-2,3-dione .
user
C9H14N2O4
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