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system
Provide the molecular formula for the IUPAC named substance (6R,7R)-7-[[(2E)-2-(2-amino-2-oxoethoxy)imino-2-[2-[(2-chloroacetyl)amino]-1,3-thiazol-4-yl]acetyl]amino]-8-oxo-3-(3-oxobutanoyloxymethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid .
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C21H21ClN6O10S2
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