You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [6-amino-5-nitro-4-[2-(4-sulfamoylphenyl)ethylamino]pyridin-2-yl]-ethylcarbamic acid by IUPAC nomenclature, provide its molecular formula.
user
C16H20N6O6S
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