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system
Name the molecular formula for the molecule established as 3-methylbutanoyloxymethyl (6R)-7-[[2-(2-amino-1,3-thiazol-4-yl)-2-hydroxyiminoacetyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate using the IUPAC nomenclature.
user
C20H25N5O8S2
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