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The introduction of 3-aminobenzotrifluoride into partially oxidized alginic acid, dextran, and polygalacturonic acid (10–100 kDa) by means of the imine formation and a subsequent reduction resulted in water-soluble materials containing 1–14% of fluorine. They showed a single or split 19F NMR signal in a narrow range of −63 to −63.5 ppm. The observed T1 and T2 were approximately 1 and 0.2 s at 400...
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