You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2,2-diethyl-7-methyl-1H-[1,2,4]triazolo[4,3-a]quinolin-2-ium-4-carboxylic acid into molecular formula.
user
C16H20N3O2+
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