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Stacked 1H-NMR (partial, 400 MHz, 1.8 × 10−1 mol/L in CD3CN, RT, from bottom to top) spectra for pure PTP ((a), bottom), PTP with TBAF ((b), 1 eq.), PTP with TBAF and Copper perchlorate ((c), 1 eq.), and PTP and Copper (II) perchlorate only ((d), top, 1 eq.).
