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Schematic presentation of the O-rebound, I-5’-2X, and OH-rebound I-6’-2X, intermediates of the intermolecular pathway for the second C–H oxidation at the C11 position starting from the C15 alcohol intermediate I-3’-X (see Figure 9 for more details). Counter-cations (CC = Py2Ag+) are not shown for clarity. Relative energies, as ΔG/ΔH, are given in kcal/mol.
