You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (2R,3R,4R,5S,6R)-2-[2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetyl]oxy-3,4,5,6,7-pentahydroxyheptanoic acid ?
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C17H28N2O15
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