You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3aR,4R,6S,6aR)-6-(hydroxymethyl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]pyrimidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H16N2O6
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