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What is the molecular formula of the compound with this IUPAC name (4S,5R,6S)-3-[6-(2-amino-2-oxoethyl)imidazo[5,1-b][1,3]thiazol-6-ium-2-yl]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate ?
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C17H18N4O5S
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