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What is the SMILES notation for (6R,7S)-3-[[1-[2-(2-carboxyethylamino)-2-oxoethyl]pyridin-1-ium-4-yl]sulfanylmethyl]-7-[[2-(2,5-dichlorophenyl)sulfanylacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ?
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