You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2S)-2-[[[[(2S)-1-ethoxy-1-oxopropan-2-yl]amino]-[(4-nitrophenoxy)methoxy]phosphoryl]amino]propanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H26N3O9P
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