Fig. 6From: Polymeric nanoparticles (PNPs) for oral delivery of insulinTypical examples of C2, C3, C4, C6, and Td symmetric monomers with aldehyde functional groups via Schiff-base chemistry for the synthesis of COFs. a) C2-, C3-NH2 and -CHO building blocks. b) C4, C6, Td-NH2 and -CHO building blocksBack to article page