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Synthetic route map or structural formula of the photocrosslinked hydrogel. (a) Synthetic route for aminopropyl vinyl ether-modified alginic acid [45]. (b) Synthetic route to N-(3-aminopropyl) methylacrylamide-modified hyaluronic acid [49]. (c) Synthetic roadmap for cinnamoyl chloride chloride-modified [51]. (d) Structural formula of heparin modified by methyl acrylate [52].
