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. 2021 Sep 21;9(9):1275. doi: 10.3390/biomedicines9091275

Figure 1.

Figure 1

Schematic of the coupling reaction between folic acid (FA) and terpolymer-based nanoparticles (NPs). Activation of carboxylic groups of FA (chemical structure shown at the top right) by EDC/NHS; formation of covalent bonds among activated esters of FA and tertiary amine of DMAEMA monomer units of terpolymer-based nanoparticles.