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system
Name the molecular formula for the molecule established as (6S)-7-[(5-amino-5-carboxypentanoyl)amino]-3-[(1-methyltetrazol-5-yl)sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid using the IUPAC nomenclature.
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C16H21N7O6S2
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