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Top: Kekulé structures of the hydrophilic dG derivatives 1 (labeled with a coumarin and represented with a blue rectangle) and 2 (unlabeled and represented with a grey rectangle). Bottom: Cartoon depictions of one of the putative heteromeric hexadecamers (hSGQ), obtained after mixing 1 and 2 in the presence of KCl, and its resulting host-guest complex with the anti-cancer drug doxorubicin (hSGQ•DOX; the cartoon depicts only one of the possible configurations for the complex).
