You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[5-(acetyloxymethyl)-3,4-dihydroxyoxolan-2-yl]-4-cyanopyridazin-1-ium-3-olate by IUPAC nomenclature, provide its molecular formula.
user
C12H13N3O6
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