in CDCl3
-
1 HNMR (400 MHz, CDCl3) δ 11.67 (s, 1H), 8.20 (d, J = 7.2 Hz, 2H), 7.68 (t, J = 7.44 Hz, 1H) 7.68 (t, J = 7.92 Hz, 2H);
in CDCl3
-
13CNMR (100MHz, CDCl3) δ 172.60, 133.89, 130.28, 129.39, 128.55.
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