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Poly[1,2-pyrrolidinediylcarbonylimino[1-(2-methylpropyl)-2-oxo-1,2-ethanediyl]imino[1-(2-methylpropyl)-2-oxo-1,2-ethanediyl]imino[1-(phenylmethyl)-2-oxo-1,2-ethanediyl]],[(S),(S),(S),(R)]- (9CI) related products: