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| 13C NMR (100 MHz, CDCl3) δ 135.41, 135.19, 132.27, 130.72, 82.16, 79.41, 66.42, 56.16, 51.65, 51.04, 44.54, 42.75, 39.74, 39.31, 36.93, 36.89, 34.67, 33.04, 30.07, 28.65, 23.38, 20.86, 20.61, 19.94, 19.63, 18.17, 17.55, 12.85. |
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