You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named sodium;(6R)-3-(acetyloxymethyl)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-hydroxyiminoacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C15H14N5NaO7S2
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