| Poly[imino[(2S)-2-(2-carboxyethyl)-1-oxo-1,2-ethanediyl]imino(1-oxo-1,2-ethanediyl)imino[(2S)-2-methyl-1-oxo-1,2-ethanediyl]imino(1-oxo-1,2-ethanediyl)imino[(2S)-2-methyl-1-oxo-1,2-ethanediyl]imino(1-oxo-1,2-ethanediyl)imino[(2S)-2-methyl-1-oxo-1,2-ethane |
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