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(A) Synthesis of photo- and pH-responsive poly(ethylene glycol)-poly(carbonate) block copolymer with nitrobenzyl ester and doxorubicin molecules conjugated via acid-sensitive Schiff-base linkage side groups. (B) In vitro cumulative release of DOX at pH 7.4, 6.0, 5.0, and pH 5.0 with 10 min UV light irradiation. Reprinted with permission from ref [164]. Copyright 2020 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim, Germany.
