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- Spectral data: 1H NMR (DMSO-d6, 470 MHz) 3.91 (s, 2H), 4.38 (d, 2H, J = 5.5 Hz), 6.73 (d, 1H, J = 7.6 Hz), 6.98 (t, 1H, J = 7.6 Hz), 7.11 (s, 1H), 7.18 (d, 1H, J = 7.6 Hz), 7.93 (br t, 1H, J = 5.5 Hz), 10.76 (br s, 1H); Exact mass calc. for C11H10N2O = 186.0793, found 186.0792.
- Spectral data: 1H NMR (DMSO-d6, 470 MHz) 3.74 (s, 3H), 3.91 (s, 2H), 4.33 (d, 2H, J = 5.6 Hz), 6.84 (d, 1H, J = 8.7 Hz), 7.09 (s, 1H), 7.12 (d, 1H, J = 8.7 Hz), 7.91 (br t, 1H, J = 5.6 Hz), 10.58 (br s, 1H); Exact mass calc. for C12H12N2O2 = 216.0898, found 216.0888.