1H NMR (600
MHz, CDCl3) δ/ppm: 8.08 (d, J =
8.6 Hz, 1H), 7.29 (dd, J = 8.6 Hz, 1H), 2.44 (s,
3H). 13C NMR (150 MHz, CDCl3) δ/ppm: 146.1,
129.9, 133.6, 21.7.
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