You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,3-dimethyl-5-[2-(2-methylpropyl)pyrrolidin-1-ium-3-yl]-2,6-dioxopyrimidin-4-olate is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H23N3O3
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