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. 2020 Aug 26;59(43):19352–19358. doi: 10.1002/anie.202008523

Figure 3.

Figure 3

NMR‐spectra during irradiation with a 660 nm LED (left) and thermal back reaction (right) at 15 °C in CD2Cl2. Shown are the characteristic chemical shifts of the bridge's N‐methyl groups and the DHPs’ methyl groups.