Scheme 1.
Chemical structures of beta-cyclodextrin, polypropylene oxide/polypropylene oxide block copolymer (Pluronic F-68, HO (C2H4O)n(C3H6O)m(C2H4O)n OH, m = 80 and n = 27) and the two encapsulated drugs: progesterone and 5-fluorouracil.
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