You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-5-[[(2R)-1-(carboxymethylamino)-1-oxo-3-sulfanylpropan-2-yl]amino]-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl)sulfanylamino]-5-oxopentanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C16H18N6O9S2
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