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For the molecule named sodium;2-[[6-[[[6-[[bis(carboxylatomethyl)amino]methyl]-4-(2,4,6-trimethoxyphenyl)pyridin-2-yl]methyl-[6-[(2-iodoacetyl)amino]hexyl]amino]methyl]-4-(2,4,6-trimethoxyphenyl)pyridin-2-yl]methyl-(carboxylatomethyl)amino]acetate;terbium(3+) by IUPAC nomenclature, provide its molecular formula.
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C48H57IN6NaO15Tb
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