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. 2019 Nov 22;11(3):618–630. doi: 10.1039/c9sc05460j

Fig. 4. (a) Synthesis route to the activatable RA-S-S-Cy prodrug. (b) Schematic illustration of the RA-S-S-Cy@PLGA NP structure and the mechanism of cytotoxicity and fluorescence enhancement produced by RA-S-S-Cy@PLGA NPs upon exposure to GSH. Adapted from ref. 75. Copyright© Ivyspring International Publisher.

Fig. 4